C©u12: Trong mét ®ît lao ®éng trång c©y, Líp 6C ®-îc ph©n c«ng trång 300 c©y. Sè c©y tæ I
trång ®-îc chiÕm 40% tæng sè c©y c¶ líp trång. Sè c©y tæ II trång b»ng 85% sè c©y mµ tæ I trång.
TÝnh sè c©y tæ III trång ®-îc, biÕt r»ng Líp 6C chØ cã 3 tæ.
Những câu hỏi liên quan
Cho ph©n sè 15/17. H·y t×m mét sè tù nhiªn sao cho khi ®em tö
sè cña
paan sè ®· cho trõ ®i sè Êy vμ ®em mÉu sè cu¶ ph©n sè ®· cho céng víi sè Êy th×
®îc mét ph©n sè míi cã gi ̧ trÞ b»ng 1/3. (8
-
12
LƯU Ý
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Mỗi thành viên được gửi tối đa 5 câu hỏi trong 1 ngày
Các câu hỏi không liên quan đến toán lớp 1 - 9 các bạn có thể gửi lên trang web h.vn để được giải đáp tốt hơn.
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Đây nhé:
Ta có :
5/7= 30/42
6/7= 30/35
5 phân số lớn hơn 5/7 và bé hơn 6/7 là : 30/41 ; 30/40 ; 30/39 ; 30/38 ; 30/37
22: a) Cho 2017 sè nguyan trong ®ã 7 sè bÊt kú lu«n cã tæng ©m. Hái tæng cña 2017 sè ®ã lμ
©m hay d-¬ng?
b) Cho 2017 sè nguyan trong ®ã 7 sè bÊt kú lu«n cã tÝch ©m. Hái tÝch cña 2017 sè ®ã lμ ©m hay
d-¬ng? Mçi sè nguyan ®ã lμ ©m hay d-¬ng?
Máy tớ lag hay cậu bị lỗi Unikey nhỉ ?? Tớ k hiểu cậu đang viết cái j :))
XL TỚ ĐANG LẤY TỪ GMAIL NÊN HƠI LÁC
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Trªn mét ®ång cá cã nh÷ng c©y cá ®uîc ph¸t triÓn b×nh thuêng. BiÕt r»ng nÕu cã 200 con dª th× ¨n hÕt sè cá trªn c¸nh ®ång trong 100 ngµy. NÕu cã 150 con dª th× sÏ ¨n hÕt sè cá trªn c¸nh ®ång trong 150 ngµy. Hái nÕu cã 100 con dª th× sÏ ¨n hÕt sè cá trong bao nhiªu ngµy?
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C©u 4*: T×m sè tù nhiªn n ®Ó ®a thøc:A(x) x2n + xn +1 chia hÕt cho ®a thøc x2 + x + 1C©u 5: Cho h×nh b×nh hµnh ABCD cã AD 2AB. KÎ ®êng th¼ng qua C vµ vu«ng gãc víi AB t¹i E. Gäi M lµ trung ®iÓm cña AD.a. Chøng minh: tam gi¸c EMC c©n.b. Chøng minh: Gãc BAD 2 gãc AEM.c. Gäi P lµ mét ®iÓm thuéc ®o¹n th¼ng EC. Chøng minh tæng kho¶ng c¸ch tõ P ®Õn Me vµ ®Õn MC kh«ng phô thuéc vµo vÞ trÝ cña P trªn ECXem nội dung đầy đủ tại:https://123doc.org/document/2813316-de-thi-hsg-toan-8-cap-huyen.htm
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C©u 4*: T×m sè tù nhiªn n ®Ó ®a thøc:A(x) = x2n + xn +1 chia hÕt cho ®a thøc x2 + x + 1
C©u 5: Cho h×nh b×nh hµnh ABCD cã AD = 2AB. KÎ ®êng th¼ng qua C vµ vu«ng gãc víi AB t¹i E. Gäi M lµ trung ®iÓm cña AD.a. Chøng minh: tam gi¸c EMC c©n.b. Chøng minh: Gãc BAD = 2 gãc AEM.c. Gäi P lµ mét ®iÓm thuéc ®o¹n th¼ng EC. Chøng minh tæng kho¶ng c¸ch tõ P ®Õn Me vµ ®Õn MC kh«ng phô thuéc vµo vÞ trÝ cña P trªn EC
Xem nội dung đầy đủ tại:https://123doc.org/document/2813316-de-thi-hsg-toan-8-cap-huyen.htm
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Cho tam gi¸c ABC vu«ng t¹i A cã 0 ABC 60 . KÎ tia Ax song song víi BC. Trªn tia Ax lÊy ®iÓm D sao cho AD=DC.
a) TÝnh sè ®o c¸c gãc: BAD DAC ;
b) Chøng minh tø gi¸
c ABCD lµ h×nh thang c©n.
giúp mik vs mk ktra huhu
Bạn ghi lại đề đi bạn ơi, khó nhìn quá
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70. Someone has to finish the job. ................................................................................... ChuyÓn tõ c©u chñ ®éng sang c©u bÞ ®éng (3) 71. They may send the man to prison. ...................................................................................72. We must do something now. ...................................................................................73. I don’t like people staring at me. ....................................................................
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70. Someone has to finish the job. ...................................................................................
ChuyÓn tõ c©u chñ ®éng sang c©u bÞ ®éng (3)
71. They may send the man to prison. ...................................................................................
72. We must do something now. ...................................................................................
73. I don’t like people staring at me. ...................................................................................
74. I dislike people making jokes about me. ...................................................................................
75. They separated the rice from the husk. ...................................................................................
76. The boys made a fire by their camp. ...................................................................................
77. They built this house more than one hundred years ago. ...................................................................................
78. Every year Viet Nam exports millions of tons of rice. ...................................................................................
79. The publisher published his book in 1996. ...................................................................................
80. They repaired my desk during the weekend. ...................................................................................
81. Nobody saw her at the party last night. ...................................................................................
82. The government has not changed the regulation. ...................................................................................
83. She didn’t introduce me to her mother. ...................................................................................
84. Someone is cutting the grass now. ...................................................................................
85. Someone ought to repair this window. ...................................................................................
86. Peter is writing a letter to his friend. ...................................................................................
87. My friends are making some phone call in the evening. ...................................................................................
88. Bad drivers are causing many accidents. ...................................................................................
89. People play football all over the world. ...................................................................................
90. They will sign the contract tomorrow. ...................................................................................
91. We will issue the library cards soon. ...................................................................................
92. Thuy has to finish her homework tonight. ...................................................................................
93. People must hand in their weapons. ...................................................................................
94. They are repairing my piano at the moment. ...................................................................................
95. A doctor has just examined John. ...................................................................................
96. The fire destroyed many houses yesterday. ...................................................................................
97. Tom will return those books to the library tomorrow. ...................................................................................
98. Bad weather has delayed Flight 202 from Miami. ...................................................................................
99. You must keep your room tidy. ...................................................................................
100. He is awarding the prize to the Thon Trieu team. ...................................................................................
101. The company has ordered some new equipment. ...................................................................................
102. I decorated the Christmas Tree yesterday. ...................................................................................
103. The tornado destroyed thirty houses. ...................................................................................
104. The manager should sign these contracts today. ...................................................................................
105. Lan will clean all the glass windows. ...................................................................................
106.Lan’s mother has to buy some oranges.
70. Someone has to finish the job. ........The job has to be finished...........................................................................
ChuyÓn tõ c©u chñ ®éng sang c©u bÞ ®éng (3)
71. They may send the man to prison. ..........The man may be sent to the prison.........................................................................
72. We must do something now. ........................Something must be done now...........................................................
73. I don’t like people staring at me. .......................I don't like being stared at............................................................
74. I dislike people making jokes about me. ...........................I dislike being made jokes about........................................................
75. They separated the rice from the husk. ..............The rice was seperated from the husk.....................................................................
76. The boys made a fire by their camp. ........................A fire was made by the boys by their camp...........................................................
77. They built this house more than one hundred years ago. .................This house was built more than 100 years ago..................................................................
78. Every year Viet Nam exports millions of tons of rice. .............Millions tons of rice are exported every year by VN......................................................................
79. The publisher published his book in 1996. ..............Book was published by the publisher in 1996.....................................................................
80. They repaired my desk during the weekend. ...................My desk was repaired during the weekend................................................................
81. Nobody saw her at the party last night. ...............................She wasn't seen at the party last night....................................................
82. The government has not changed the regulation. ..................The regulation hasn't been changed by the government.................................................................
83. She didn’t introduce me to her mother. ..............I wasn't introduced to her mother.....................................................................
84. Someone is cutting the grass now. .........................The grass is being cut now..........................................................
85. Someone ought to repair this window. ..................This window ought to be repaired.................................................................
86. Peter is writing a letter to his friend. ........................A letter is being written to Peter's friend by him...........................................................
87. My friends are making some phone call in the evening. ...................Some phone calls are being made by my friends in the evening................................................................
88. Bad drivers are causing many accidents. ........................Many accidents are being caused by bad drivers...........................................................
89. People play football all over the world. .........................Football is played all over the world..........................................................
90. They will sign the contract tomorrow. ..............The contract will be signed tomorrow.....................................................................
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70. Someone has to finish the job. ..............The job had to be finished......................................................................
71. They may send the man to prison. ....................The man may be sent to prison................................................................
72. We must do something now. ..........Something must be done now..........................................................................
73. I don’t like people staring at me. ............People didn't be liked staring at me........................................................................
74. I dislike people making jokes about me. ..........People is disliked making jokes about me..........................................................................
75. They separated the rice from the husk. .............The rice was separated from the husk.......................................................................
76. The boys made a fire by their camp. ..............A fire was made by their camp......................................................................
77. They built this house more than one hundred years ago. ..........This house was built more than one hundred years ago..........................................................................
78. Every year Viet Nam exports millions of tons of rice. ...............Exports millions of tons of rice is eat in Viet Nam every year.
....................................................................
79. The publisher published his book in 1996. .............The publisher’s book was published in 1996.......................................................................
80. They repaired my desk during the weekend. ................My desk was repaired during the weekend...................................................................
81. Nobody saw her at the party last night. ........... She wasn't seen at the party last night........................................................................
82. The government has not changed the regulation. ..............The regulation hasn't been changed by the government.....................................................................
83. She didn’t introduce me to her mother. ....... I wasn't introduced to her mother ............................................................................
84. Someone is cutting the grass now. ............. The grass is being cut now......................................................................
85. Someone ought to repair this window. ............... This window ought to be repaired....................................................................
86. Peter is writing a letter to his friend. ...........A letter is being written to his friend by Peter........................................................................
87. My friends are making some phone call in the evening. .......Some phone calls are being made by my friends in the evening......................................................................
88. Bad drivers are causing many accidents. ....................Many accidents are being caused by bad drivers...............................................................
89. People play football all over the world. ....... Football is played all over the world............................................................................
90. They will sign the contract tomorrow. ..........The contract will be signed tomorrow..........................................................................
91. We will issue the library cards soon. .............. The library cards will be issued soon......................................................................
92. Thuy has to finish her homework tonight. .............Thuy's homework has to be finished tonight......................................................................
93. People must hand in their weapons. ....... Their weapons must be handed in.............................................................................
94. They are repairing my piano at the moment. ........My piano is being repaired at the moment............................................................................
95. A doctor has just examined John. ................ John has just been examined by a doctor....................................................................
96. The fire destroyed many houses yesterday. ........Many houses were destroyed yesterday by the fire............................................................................
97. Tom will return those books to the library tomorrow. ................Those books will be returned to the library tomorrow by Tom....................................................................
98. Bad weather has delayed Flight 202 from Miami. ........... Flight 202 from Miami has been delayed by bad weather........................................................................
99. You must keep your room tidy. .....................Your room must be kept tidy...............................................................
100. He is awarding the prize to the Thon Trieu team. ...............The prize is being awared to Thon Trieu team by him....................................................................
101. The company has ordered some new equipment. ..........Some new equipment has been ordered by the company........................................................................
102. I decorated the Christmas Tree yesterday. .............The Christmas tree was decorated by my mother yesterday......................................................................
103. The tornado destroyed thirty houses. .............. Thirty houses were destroyed by the tornado......................................................................
104. The manager should sign these contracts today. ............... These contracts should be signed by the manager today....................................................................
105. Lan will clean all the glass windows. ..............All the glass windows will be cleaned by Lan.....................................................................
106.Lan’s mother has to buy some oranges..........................Some oranges have to be bought by Lan's mother..................................
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91. We will issue the library cards soon. ...........The library cards will be issued soon........................................................................
92. Thuy has to finish her homework tonight. ............................Thuy's homework has to be finished by her tinight......................................................
93. People must hand in their weapons. ............Their weapons must be handed in .......................................................................
94. They are repairing my piano at the moment. .........My piano is being repaired at the moment..........................................................................
95. A doctor has just examined John. ...........John has just been examined by a doctor........................................................................
96. The fire destroyed many houses yesterday. ...................Many houses were destroyed by the fire yesterday................................................................
97. Tom will return those books to the library tomorrow. .......................Those book will be returned to the library tomorrow............................................................
98. Bad weather has delayed Flight 202 from Miami. ................Flight 202 from Miami has been delayed by bad weather...................................................................
99. You must keep your room tidy. ..........................Your room must be kept tidy .........................................................
100. He is awarding the prize to the Thon Trieu team. ................Thon Trieu team is being awarded by him..................................................................
101. The company has ordered some new equipment. .............Some new equipment has been ordered by the company......................................................................
102. I decorated the Christmas Tree yesterday. ...........The Christmas was decorated by me yesterday........................................................................
103. The tornado destroyed thirty houses. ......................Thirty house were destroyed by the tornado.............................................................
104. The manager should sign these contracts today. ..........These contracts should be signed today by the manager.........................................................................
105. Lan will clean all the glass windows. ............All the glass windows will be cleaned by Lan.......................................................................
106.Lan’s mother has to buy some oranges. Some oranges have to be bought by Lan's mother
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C©u 10 (1.0 điểm): Mét m¶nh vườnn h×nh thang cã ®¸y bÐ 25m, ®¸y lín 31m. NÕu ®¸y lín t¨ng thªm 6,5m th× diÖn tÝch sÏ t¨ng thªm 65m2. TÝnh diÖn tÝch m¶nh vườnn h×nh thang ®ã?
Thầy nhập lại đề nha thầy, lỗi font ạ
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