Question

Bài 2 và bài 3

 

Answer 1

`4 + 5/11= 44/11 + 5/11= 49/11`

`13 - 3/2=26/2 - 3/2= 23/2`

`1-(1/3+ 1/2)= 1-(2/6 + 3/6)=1- 5/6= 6/6-5/6=1/6`

`1/12xx4/5=(1xx4)/(12xx5)= 4/60= 1/15`

`40/7xx 21/5= (40xx21)/(7xx5)= 840/35=24`

`9/5 : 4/7= 9/5 xx 7/4=63/20`

 

Answer 2

`11/24 : 44/3= 11/24 xx 3/44 = 33/1056=1/32`