4/5×1/9+4/5÷9 简便计算

问题描述:

4/5×1/9+4/5÷9 简便计算

等于4/5×2÷9=8/45

=4/5×1/9+4/5×1/9
=(4/5×1/9)×2
=4/45×2
=8/45

4/5×1/9+4/5÷9
=4/5×1/9+4/5×1/9
=2×4/5×1/9
=8/45