7.4*5.6+7.4+5.4-74*0.1(简算)
问题描述:
7.4*5.6+7.4+5.4-74*0.1(简算)
答
7.4*5.6+7.4+5.4-74*0.1
=7.4*5.6+7.4+5.4-7.4*1
=7.4*(5.6+5.4-1)
=7.4*10
=74