Question

2,74+3,75+4,2+6,25+0,8+2,26

Answer 1

= ( 2,74 + 2,26 ) + ( 3,75 + 6,25 ) + ( 4,2 + 0,8 )

= 5 + 10 + 5

= 20

Chúc bạn zui :3

Answer 2

\(2,74+3,75+4,2+6,25+2,26\)

\(=\left(2,74+2,26\right)+\left(3,75+6,25\right)+\left(4,2+0,8\right)\)

\(=5+10+5\)

\(=20\)