Đáp án:

`25×37+49×25+86×75`

`= 25×(37 + 49) + 86 ×75`

`= 25× 86 + 86 ×75`

`= 86 × (25 + 75)`

`= 86 × 100`

`= 8600`

`37×112+63×101-11×37`

`= 37×(112 - 11) + 63 × 101`

`= 37× 101 + 63 × 101`

`= 101×(37 + 63)`

`= 101× 100`

`= 10100`

`35×101+100×65`

`= 35 ×( 100 + 1 )+ 100 × 65`

`= 3500 + 35 + 6500`

`= 10000 + 35`

`=10035`

Câu cuối theo mik sửa đề là

`17×40+83×40`

`= 40×(17+ 83)`

`= 40× 100`

`= 4000`

@Thỏ

`25 times 37 + 49 times 25 + 86 times 75`

`= 25 times 37 + 49 times 25 + 86 times 25 times 3`

`= 25 times (37 + 49 + 86 times 3)`

`= 25 times (86 + 86 times 3)`

`= 25 times [86 (1 + 3)]`

`= 25 times [86 times 4]`

`= 25 times 86 times 4`

`= (25 times 4) times 86`

`= 100 times 86`

`= 8600`

`37 times 112 + 63 times 101 - 11 times 37`

`= 37 times (112-11) + 63 times 101`

`= 37 times 101 + 63 times 101`

`= 101 times (37 + 63)`

`= 101 times 100`

`= 10100`

`35 times 101 + 100 times 65`

`= 3535 +  6500`

`= 10035`