简便方法计算 4.428.6+41.15.6原式=（10-5.6）28.6+41.15.6=1028.6-5.628.6+41.15.6=286+（41.1-28.6）5.6=286+12.55.6=286+12.58*0.7=286+70=356

分类: 作业答案 • 2022-05-16 11:32:34

问题描述：

简便方法计算 4.4*28.6+41.1*5.6
原式=（10-5.6）*28.6+41.1*5.6
=10*28.6-5.6*28.6+41.1*5.6
=286+（41.1-28.6）*5.6
=286+12.5*5.6
=286+12.5*8*0.7
=286+70
=356

答

原式=（10-5.6）*28.6+41.1*5.6
=10*28.6-5.6*28.6+41.1*5.6
=286+（41.1-28.6）*5.6
=286+12.5*5.6
=286+12.5*8*0.7
=286+700
=986

简便方法计算 4.4*28.6+41.1*5.6原式=（10-5.6）*28.6+41.1*5.6=10*28.6-5.6*28.6+41.1*5.6=286+（41.1-28.6）*5.6=286+12.5*5.6=286+12.5*8*0.7=286+70=356