45-59+(-45)+55
help
Những câu hỏi liên quan
giup voi
a). Tính giá trị biểu thức
(128,4 - 73,2) : 2,4 + 18,32
b) Tìm x biết: 210 : x = 14,92 - 6,52
c) Tính thuận tiện
46 : 24 + 8 : 24
705 : 45 - 336 : 45
23,45 : 12,5 : 0,8
a) ( 128,4 - 73,2 ) : 2,4 + 18,32 = 55,2 : 2,4 + 18,32 = 23 + 18,32 = 42,32
b) 210 : x = 14,92 - 6,52
210 : x = 8,4
x = 210 : 8,4
x = 25
c) mình không biết xin lỗi bạn nha
k cho mình nha, yên tâm mình được việc lắm ( uy tín )
giup nhan voi
a). Tính giá trị biểu thức
(128,4 - 73,2) : 2,4 + 18,32
b) Tìm x biết: 210 : x = 14,92 - 6,52
c) Tính thuận tiện
46 : 24 + 8 : 24
705 : 45 - 336 : 45
23,45 : 12,5 : 0,8
tính thuận tiện :
a) (−23+37):45+(−13+47):45(−23+37):45+(−13+47):45
b) 59:(111−522)+59:(115−23)
\(=\left(-23+27-13+47-23+37-13+47\right):45\)\(=\left(-23.2-13.2+27.2+47.2\right):45=\left(-72+148\right):45=\frac{76}{45}\)\(=59:\left(111-522+115-23\right)=59:\left(-319\right)\)
Đúng 0
Bình luận (0)
a). Tính giá trị biểu thức
(128,4 - 73,2) : 2,4 + 18,32
a). Tính giá trị biểu thức
(128,4 - 73,2) : 2,4 + 18,32
b) Tìm x biết: 210 : x = 14,92 - 6,52
Một mảnh bìa hình vuông có diện tích là 36cm2. Tính chu vi mảnh bìa đó
Đọc tiếp
Một mảnh bìa hình vuông có diện tích là . Tính chu vi mảnh bìa đó
36 = 6x 6
chu vi la
6 x 4 =24 cm
ds 24 cm
Vì diện tích hình vuông bằng cạnh nhân cạnh nên 1 cạnh là 6cm
Chu vi mảnh bìa là:
6 nhân 4=24 (cm)
Đáp số : 24 cm
Hai vật C và D chuyển động với tốc độ lần lượt là 20m/s và 0,01km/s. Kết luận nào sau đây là đúng.
alo ghi thiếu kì bạn
Make question for the underlined part of each sentence.1. Marry moved to her new house 5 months ago.2. The airplane takes off at 6 p.m. tomorrow.3. James is helping an old man cross the road.4. The children visit their grandparents every two months.5. My mother is always complaining about my untidiness.6. The couple has sent a letter to their daughter.7. Many people are queuing in front of the shop because a hot item is on sale.8. They have watched this movies three times.9. I often learn a new...
Đọc tiếp
Make question for the underlined part of each sentence.
1. Marry moved to her new house 5 months ago.
2. The airplane takes off at 6 p.m. tomorrow.
3. James is helping an old man cross the road.
4. The children visit their grandparents every two months.
5. My mother is always complaining about my untidiness.
6. The couple has sent a letter to their daughter.
7. Many people are queuing in front of the shop because a hot item is on sale.
8. They have watched this movies three times.
9. I often learn a new word by making sentences with it.
10. This dress costs me $100 to buy.
Make question for the underlined part of each sentence.
1. Marry moved to her new house 5 months ago.
=> When did Marry move to her new house ?
2. The airplane takes off at 6 p.m. tomorrow.
=> When does The airplane take off?
3. James is helping an old man cross the road.
=> Who is helping an old man cross the road?
4. The children visit their grandparents every two months.
=> How often do The children visit their grandparents?
5. My mother is always complaining about my untidiness.
=> What is your mother always complaining about ?
6. The couple has sent a letter to their daughter.
=> What has The couple sent to their daughter?
7. Many people are queuing in front of the shop because a hot item is on sale.
=> Why are Many people queuing in front of the shop?
8. They have watched this movies three times.
=> How many times have they watched this movies ?
9. I often learn a new word by making sentences with it.
=> How do you often learn a new word ?
10. This dress costs me $100 to buy
=> How much this dress cost you to buy ?
Kết quả phân tích đa thức (2x - 3)2 + (x - 2)2 - 2(2x - 3)(2 - x) thành nhân tử là:
(2x-3)2 - 2(2x-3)(2 - x) + (x-2)2
= (2x-3)2 - (2x-3)(2 - x) - (2x-3)(2 - x ) - (2 - x)2
= (2x-3)(3x - 5) - (2-x)(3x - 5)
= (3x - 5)2
Ui mình sai.
Sửa :
(2x-3)2 - (2x-3)(2-x) + (x-2)2
= (2x-3)2 - (2x-3)(2-x) + (2-x)2
= (3x-5)(2x-3) + (3x-5)(2-x)
= (3x-5)(x -1)
câu sửa của bạn sai hay sao ý bạn
31 tháng 7 2023 lúc 16:04
a)-524 . [(23+(-45)]+524.(-45+123)
b)47.69-31.(-47)
c)16.(38-2)-38.(16-1)
d) (-41).(59+2)+59.(41-2)
e) 125.(-8).(-25).9.4.100^0 :3
a) \(-524\cdot\left[23+\left(-45\right)\right]+524\cdot\left(-45+123\right)\)
\(=-524\cdot\left[\left(23-45\right)-\left(-45+123\right)\right]\)
\(=-524\cdot\left(23-45+45-123\right)\)
\(=-524\cdot-100\)
\(=52400\)
b) \(47\cdot69-31\cdot\left(-47\right)\)
\(=-47\cdot\left(-69-31\right)\)
\(=-47\cdot-100\)
\(=4700\)
c) \(16\left(38-2\right)-38\left(16-1\right)\)
\(=16\cdot38-16\cdot2-38\cdot16+38\)
\(=-16\cdot2+38\)
\(=-36+38\)
\(=2\)
d) \(\left(-41\right)\cdot\left(59+2\right)+59\cdot\left(41-2\right)\)
\(=-41\cdot59-41\cdot2+41\cdot59-2\cdot59\)
\(=-41\cdot2-2\cdot59\)
\(=-2\left(41+59\right)\)
\(=-2\cdot100\)
\(=-200\)
e) \(25\cdot\left(-8\right)\cdot\left(-25\right)\cdot9\cdot4\cdot100^0:3\)
\(=\left(-1000\right)\cdot\left(-25\right)\cdot9\cdot4\cdot1:3\)
\(=25000\cdot9\cdot4:3\)
\(=25000\cdot3\cdot4\)
\(=100000\cdot3\)
\(=300000\)
Đúng 4
Bình luận (0)