Question

ai giải giúp mình với ạ

a) 4,57 x 42 + 5,43 x 42

b) 8,4 x 96 +1,6 x 96

Answer 1

`#3107.101107`

`a)`

`4,57 \times 42 + 5,43 \times 42`

`= 42 \times (4,57 + 5,43)`

`= 42 \times 10`

`= 420`

`b)`

`8,4 \times 96 + 1,6 \times 96`

`= 96 \times (8,4 + 1,6)`

`= 96 \times 10`

`= 960`

Answer 2

a) 4,57x42+5,43x42
= (4,57+5,43)x42
= 10x42
=420

b) 8,4x96+1,6x96
= (8,4+1,6)x96
= 10x96
= 960