Question

Answer 1

`!`

`148 +123+52+377`

`= ( 148 +52)+ (123+377)`

`= 200+ 500`

`=700`

`----------`

`5^9 : 5^7 + 12 .3 +7^0`

`= 5^2 + 36 + 1`

`= 25 +36+1`

`= 61+1`

`=62`

`----------`

`87 . 23 + 13 . 93 + 70 . 87`

`= 87 . ( 23+70) + 13 . 93`

`= 87 . 93 + 13 . 93`

`= 93(87+13)`

`=93.100`

`=9300`

`----------`

`10^2 - [50: (5^6 : 5^4 -3.5)]`

`= 100-[50: (5^2 -15)]`

`=  100-(50:10)`

`=100- 5`

`=95`

 

Answer 2

a)=(148+52)+(123+377)=200+500=700 nhé