0,2x17x7 +0,14x520+31x1,4
= 3,4 x 7 + 72,8 + 43,4
= 23,8 + 72,8 + 43,4
= 96,6 + 43,4
= 140.
Hok tốt ^_^ !
= 23.8 + 72.8 + 43.4
=140
\(0,2.17.7+0,14.520+31.1,4\)
\(=1,4.17+1,4.52+1,4.31\)
\(=1,4.\left(17+52+31\right)\)
\(=1,4.100\)
\(=140\)
Trả lời:
\(0,2.17.7+0,14.520+31.1,4\)
\(=1,4.17+1,4.52+31.1,4\)
\(=1,4\left(17+52+31\right)\)
\(=1,4.100\)
\(=140\)
Hok tốt!
Good girl