3.5×4.28+7.5×5.724.28×4.3简便算法
1个回答

5.724.是3.5*4.28+7.5*5.72+4.28*4.3吗?如果是,解法如下

3.5*4.28+7.5*5.72+4.28*4.3

=3.5*4.28+7.5*(10-4.28)+4.28*4.3

=3.5*4.28+7.5*10-7.5*4.28+4.28*4.3

=4.28*(3.5-7.5+4.3)+75

=4.28*(0.3)+75

=76.284

如果不是,需要从新计算