神马作文网两道简单的数学简算题0.8888*0.6+0.2222*7.656*1.02-1.4*0.8
来源：学生作业帮 编辑：神马作文网作业帮 分类：数学作业 时间：2024/09/22 13:24:31
两道简单的数学简算题
0.8888*0.6+0.2222*7.6
56*1.02-1.4*0.8
0.8888*0.6+0.2222*7.6
56*1.02-1.4*0.8
0.8888*0.6+0.2222*7.6
=0.2222*0.6*4+0.2222*7.6
=0.2222*2.4+0.2222*7.6
=0.2222*（2.4+7.6）
=0.2222*10
=2.222
56*1.02-1.4*0.8
=56*（1+0.02）-1.4*0.8
=56*1+56*0.02-1.4*0.8
=56+5.6*0.2-1.4*0.8
=56+0.8*7*0.2-1.4*0.8
=56+0.8*1.4-1.4*0.8
=56
=0.2222*0.6*4+0.2222*7.6
=0.2222*2.4+0.2222*7.6
=0.2222*（2.4+7.6）
=0.2222*10
=2.222
56*1.02-1.4*0.8
=56*（1+0.02）-1.4*0.8
=56*1+56*0.02-1.4*0.8
=56+5.6*0.2-1.4*0.8
=56+0.8*7*0.2-1.4*0.8
=56+0.8*1.4-1.4*0.8
=56