Question

Tính nhanh 0,175 x 74,24 + 25,76 x 0,175 + 20,5 

Answer 1

\(0,175\times74,24+25,76\times0,175+20,5\)
\(=0,175\times\left(74,24+25,76\right)+20,5\)
\(=0,175\times100+20,5\)
\(=17,5+20,5=38\)

Answer 2

`0,175xx74,24+25,76xx0,175+20,5`

`=0,175xx(74,24+25,76)+20,5`

`=0,175xx100+20,5`

`=17,5+20,5`

`=38`

Answer 3