3 x 7/10 + 7/10 x 5 +2 x 7/10
=7/10 x (3 + 5 + 2)
= 7/10 x 10
= 70/10=7
hok tốt nha
\(3\times\frac{7}{10}+\frac{7}{10}\times5+2\times\frac{7}{10}\)
\(=\frac{7}{10}\times\left(3+5+2\right)\)
\(=\frac{7}{10}\times10=\frac{7\times10}{10}=7\)
3 × 7/10 + 7/10 × 5 + 2 × 7/10
= ( 3 + 2 + 5 ) × 7/10
= 10 × 7/10
= 7
3 x 7/10 + 7/10 x 5 + 2 x 7/10
= 7/10 x ( 3 + 5 + 2 )
= 7/10 x 10
= 7
Hok tốt ~
K mị @@