Question

tính bằng cách thuận tiện nhất:

3x7/10+7/10x5+2x7/10

Answer 1

` 3xx 7/10 + 7/10 xx 5 +2 xx 7/10`

`=7/10 xx (3+5+2)`

`= 7/10 xx 10`

`=7`

Answer 2

\(3\times\dfrac{7}{10}+\dfrac{7}{10}\times5+2\times\dfrac{7}{10}=\dfrac{7}{10}\times\left(3+5+2\right)=\dfrac{7}{10}\times10=7\)

Answer 3

7

Answer 4

= 7

Answer 5

7

Answer 6

Bằng 7 nha

Answer 7

Answer 8

( 3+5+2 ) x 7/10

= 10 x 7/10

= 7

Answer 9

=7/10×(3+5+2)

=7/10×10

=7