Question

tính nhanh:0,72x65+0,75 x 8+35 x 0,72+0,25x8

Answer 1

\(0,72\times65+0,75\times8+35\times0,72+0,25\times8=0,72\times\left(65+35\right)+8\times\left(0,75+0,25\right)=0,72\times100+8\times1=72+8=80\)

Answer 2

0,72×65+0,75×8+35×0,72+0,25×8=0,72×(65+35)+8×(0,75+0,25)=0,72×100+8×1=72+8=80