5×96+5.7×4+0.7×66的简便算法
问题描述:
5×96+5.7×4+0.7×66的简便算法
答
5×96+5.7×4+0.7×66
=5×96+5×4+0.7×4+0.7×66
=5×(96+4)+0.7×(4+66)
=5×100+0.7×70
=500+49
=549