Question

[Nguyễn Hoài Anh]

5,6*7,9+7,9*1,7+7,3*2,1
 

Answer 1

[Trang]

\(5,6\times7,9+7,9\times1,7+7,3\times2,1\)

\(=7,9\times\left(5,7+1,7\right)+7,3\times2,1\)

\(=7,9\times7,3+7,3\times2,1\)

\(=7,3\times\left(7,9+2,1\right)\)

\(=7,3\times10\)

\(=73\)

Học tốt

Answer 2

[trần vũ kiên]

814,212,9373