A=269-(268+267+266+...+22+2+1)
Tính nhanh A
So sánh các số hữu tỉ sau bằng cách nhanh nhất
a)267/-268 và -1347/1343
b)-22/35 và -103/177
a)267/-268 > -1347/1343
b)-22/35 > -103/177
cho mk xin cách giải nhé bn
a)267/-268<1 còn -1347/1343>1. Vậy 267/-268>-1347/1343. b)-22/35 cách ít đơn vị hơn -103/177. Vậy -22/35>-103/177
Bài 1: So sánh các số sau:(so sánh bằng cách nhanh nhất)
a) -17 và 23 b)-1 và 2 c) 2 và 5 d)267 và -1347
36 -48 3 5 7 4 -268 1343
Bài 2: Tính bằng 2 cách:
5 -(1 3-0,4)
2 7
Bài 1:
a) \(\dfrac{-17}{36}\) và \(\dfrac{23}{-48}\)
\(\dfrac{-17}{36}=\dfrac{-17.4}{36.4}=\dfrac{-68}{144}\)
\(\dfrac{23}{-48}=\dfrac{-23}{48}=\dfrac{-23.3}{144.3}=\dfrac{-69}{144}\)
Vì \(\dfrac{-68}{144}>\dfrac{-69}{144}\) nên \(\dfrac{-17}{36}>\dfrac{23}{-48}\)
b) \(\dfrac{-1}{3}\) và \(\dfrac{2}{5}\)
Vì \(\dfrac{-1}{3}\) là số âm mà \(\dfrac{2}{5}\) là số dương nên \(\dfrac{-1}{3}< \dfrac{2}{5}\)
c) \(\dfrac{2}{7}\) và \(\dfrac{5}{4}\)
Vì \(\dfrac{2}{7}< 1\) mà \(\dfrac{5}{4}>1\) nên \(\dfrac{2}{7}< \dfrac{5}{4}\)
d) \(\dfrac{267}{-268}\) và \(\dfrac{-1347}{1343}\)
\(\dfrac{267}{-268}=\dfrac{-267}{268}=\dfrac{-267.449}{268.449}=\dfrac{-119883}{120332}\)
\(\dfrac{-1347}{1343}=\dfrac{-1347.89}{1343.89}=\dfrac{-119883}{119527}\)
Vì \(\dfrac{-119883}{120332}>\dfrac{-119883}{119527}\) nên \(\dfrac{267}{-268}>\dfrac{-1347}{1343}\)
Bài 2:
\(\dfrac{5}{2}-\left(1\dfrac{3}{7}-0,4\right)=\dfrac{5}{2}-\dfrac{10}{7}-\dfrac{2}{5}=\dfrac{47}{70}\)
So sánh 2 phân số sau bằng cách nhanh nhất:
a)-1/5 và 1/1000
b)267/-268 và -134/134
CÁC BẠN GIÚP MK NHA MAI MK NỘP RỒI!! :))
a) \(\frac{-1}{5}< 0\)
\(\frac{1}{1000}>0\)
=> -1/5 < 1/1000
b) 267/-268 = -267/268 < -1
-134/134 = -1
=> 267/-268< -134/134
Chúc bạn học giỏi
a; -1/5<0;;1/1000>0
-1/5<1/1000
B,-134/134=-1
267/-268=-1+1/268
267/-268<-134/134
k cho mk nha
So sánh
a, -24 / 35 & -19 / 30
b, 2^91 & 5^35
c, 5^22 & 2^55
d, -13 / 38 & 29 / -88
e, 267 / -268 & -1347 / 1343
266. They made her hand over her passport.
She ____________________________________________________________________
267. I tried to eat that cake but it was too sweet.
It was __________________________________________________________________
268. My brother and I went to that school.
I went to _______________________________________________________________
269. I often get up early in the morning.
I ______________________________________________________________________
270. Getting a good job doesn’t interest him.
He ____________________________________________________________________
271. The garden is too small to play football in.
The garden _____________________________________________________________
272. Be he rich or poor, she will marry him.
She will ________________________________________________________________
273. We haven’t been to the movies for a year.
It’s ____________________________________________________________________
274. John used to smoke.
John didn’t _____________________________________________________________
266. They made her hand over her passport.
She ____WAS MADE TO HAND OVER HER PASSPORT___
267. I tried to eat that cake but it was too sweet.
It was __SUCH A SWEET CAKE THAT I COULDN'T EAT ____
268. My brother and I went to that school.
I went to ___THAT SCHOOL WITH MY BROTHER__
269. I often get up early in the morning.
I ___AM USED TO GETTING UP EARLY IN THE MORNING____
270. Getting a good job doesn’t interest him.
He __ISN'T INTERESTED IN GETTING A GOOD JOB____
271. The garden is too small to play football in.
The garden _ISN'T BIG ENOUGH TO PLAY FOOTBALL IN_
272. Be he rich or poor, she will marry him.
She will __MARRY HIM WHETHER HE IS RICH OR POOR__
273. We haven’t been to the movies for a year.
It’s ___A YEAR SINCE WE LAST WENT TO THE MOVIES____
274. John used to smoke.
John didn’t ___SMOKE ANYMORE___
266. They made her hand over her passport.
She was made hand over her passport____________________________________________________________________
267. I tried to eat that cake but it was too sweet.
It was such sweet cake that i tried__________________________________________________________________
268. My brother and I went to that school.
I went to that school with my brother_______________________________________________________________
269. I often get up early in the morning.
I ______________________________________________________________________
270. Getting a good job doesn’t interest him.
He doesn't interest to get a good job____________________________________________________________________
271. The garden is too small to play football in.
The garden isn't big enough to play football in_____________________________________________________________
272. Be he rich or poor, she will marry him.
She will marry him ,if he is rich________________________________________________________________
273. We haven’t been to the movies for a year.
It’s a year since we have been to the movies____________________________________________________________________
274. John used to smoke.
John didn’t use to smoke_____________________________________________________________
so sánh
a, -21/35 vs -19/30
b. 2^91 & 5^35
c, 5^22 & 2^55
c, -13/38 & 29/-88
d, 267/-268 & -1347/1343
So sánh:
Câu 1 -22/35 và -103/107
Câu 2: -13/38 và 29/-88
Câu 3 267/-268 và -1347/1343
Câu 4: -27/35 và -21/40
Câu 5 -22/45 và -17/33
So sánh các số hữu tỉ sau bằng cách nhanh nhất:
a) -\frac{1}{5}−51 và \frac{1}{1000}10001; b) \frac{267}{-268}−268267 và -\frac{1347}{1343}−13431347 ;
c)-\frac{13}{38}−3813 và \frac{29}{-88}−8829;
Bài 1. Tính giá trị biểu thức sau ( Tính nhanh nếu có thể)
a, 59 + 532 +267 + 268 + 733
b, 37 × 62 + 37 × 38
c,( 1356 + 845 ) - ( 356 + 645 )
d,4 × 37 × 25 × 3 × 7
Giải giúp mình nhé mình cầu xin các bạn 🙏🙏🙏
mk bt làm mỗi 1 câu thui thông cảm
B) 37 x 62 + 37 x 38
37 x ( 62+38)
37 x 100
3700
hok tốt
a, 59 + 532 + 267 + 268 + 733
= 59 + ( 532 + 268 ) + ( 267 + 733 )
= 59 + 800 + 1000
= 859 + 1000
= 1859
b, 37 × 62 + 37 × 38
= 37 × ( 62 + 38 )
= 37 × 100
= 3 700
c, ( 1356 + 845 ) - ( 356 + 645 )
= 1356 + 845 - 356 - 645
= ( 1356 - 356 ) + ( 845 - 645 )
= 1000 + 200
= 1 200
a, 59 + 532 +267 + 268 + 733
= 59 + ( 532 + 268 ) + ( 267 + 733 )
= 59 + 800 + 1000 = 1859
b, 37 × 62 + 37 × 38
= 37 x ( 62 + 38 )
= 37 x 100 = 3700
c, ( 1356 + 845 ) - ( 356 + 645 )
= ( 1356 - 356 ) + ( 845 - 845 )
= 1000 + 200 = 1200
d,4 × 37 × 25 × 3 × 7
= ( 4 x 25 ) x ( 37 x 3 x 7 )
= 100 x 777 = 77700
1. So sánh các số hữu tỉ sau bằng cách nhanh nhất
a) 267/-268 và -1347/1343
b) -13/38 và 29/ -88
2.So sánh a/b (b>0) và a+n/b+n ( n thuộc N*)
Câu a : \(-\dfrac{267}{268}\) và \(-\dfrac{1347}{1343}\)
Ta có :
\(-\dfrac{267}{268}>-1\)
\(-\dfrac{1347}{1343}< -1\)
\(\Rightarrow-\dfrac{267}{268}>-\dfrac{1347}{1343}\)
Câu b :
\(-\dfrac{13}{38}\) và \(-\dfrac{29}{88}\)
Quy đồng cùng mẫu số ròi so sánh tử