33乘以66加99乘以78用乘法分配律计算怎么算
问题描述：
33乘以66加99乘以78用乘法分配律计算怎么算
答
(1)33*66+99*78
=33*(3*22)+99*78
=33*3*22+99*78
=99*22+99*78
=99*(22+78)
=99*100
=9900
(2)33*66+99*78
=33*(66+3*78)
=33*(3*(22+78))
=33*(3*100)
=33*300
=9900
答
33*66+99*78
=33*66+33*3*78
=33*66+33*234
=33*（66+234）
=33*300
=9900