0.87乘9.9的简便运算
来源:学生学帮网 编辑:学帮网 时间:2024/06/05 15:08:49
0.87乘9.9的简便运算
=0.87×(10-0.1)
=0.87×10-0.87×0.1
=8.7-0.087
=8.613
0.87*9.9
=0.87*(10-0.1)
=0.87*10-0.87*0.1
=8.7-0.087
=8.613
0.87*(10-0.1)
=0.87*10+0.87*0.1
=8.7-0.087
=8.613
0.87×(10-0.1)=8.613 可以使用分配律