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