求解一道计算题,要用简便算法:0.125*3.2+0.125*5.8-1/8务必答对

来源:学生作业帮助网 编辑:作业帮 时间:2024/05/02 09:25:36

求解一道计算题,要用简便算法:0.125*3.2+0.125*5.8-1/8务必答对
求解一道计算题,要用简便算法:0.125*3.2+0.125*5.8-1/8
务必答对

求解一道计算题,要用简便算法:0.125*3.2+0.125*5.8-1/8务必答对
0.125*3.2+0.125*5.8-1/8
=0.125*8*0.4+0.125*5.8-0.125
=1*0.4+0.125*5+0.125*0.8-0.125
=0.4+0.125*(5-1)+0.1
=0.4+0.5+0.1
=1

1/8=0.125
所以原式=0.125*(3.2+5.8-1)=0.125*8=1

0.125*(3.2+5.8-1)=1