7.2x5-8x 11.2等于

题目

7.2x5-8x 11.2等于

答案

简算吗
7.2*5-8*11.2
=7.2*5-8*(7.2+4)
=7.2*5-8*7.2-8*4
=7.2*(5-8)-32
=-7.2*3-32
=-21.6-32
=-53.6