36*7.2+7.4*72+110*2.8(j简便运算)
问题描述:
36*7.2+7.4*72+110*2.8(j简便运算)
答
36*7.2+7.4*72+110*2.8
=36*7.2+74*7.2+110*2.8
=(36+74)*7.2+110*2.8
=110*7.2+110*2.8
=110*(7.2+2.8)
=110*10
=1100