关于乘法分配律易错简便计算题（不同类型)5道

2.7x4.8+2.7x5.2
=2.7x(4.8+5.2)
=2.7x10
=27
905x99+905
=905x(99+1)
=905x100
=90500
13x(10+0.2)
=13x10+13x0.2
=130+2.6
=132.6
25x48
=25x(40+8)
=25x40+25x8
=1000+200
=1200
36x(2/9+7/12)
=36x2/9+36x7/12
=8+21
=29本回答被网友采纳