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:

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:

\(\dfrac{5}{2}-\left(1\dfrac{3}{7}-0,4\right)=\dfrac{5}{2}-\dfrac{10}{7}-\dfrac{2}{5}=\dfrac{47}{70}\) 

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

jihoon a bn?

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_____________________________________________________________

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

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