72x28简便运算?

2024-11-25 15:59:37
推荐回答(1个)
回答1:

72x28
=(70+2)x28
=70x28+2x28
=1960+56
=2016

72x28
=72x(30-2)
=72x30-72x2
=2160-144
=2016