20-18.99有没有简便算法?
问题描述:
20-18.99有没有简便算法?
答
=20-(19-0.01)
=20-19+0.01
=1+0.01
=1.01
20-18.99有没有简便算法?
=20-(19-0.01)
=20-19+0.01
=1+0.01
=1.01