1.用简便算法计算下题:(1)135×99 = = =
问题描述:
1.用简便算法计算下题:(1)135×99 = = =
答
135×100-135
答
135×99=135×(100-1)=135×100-135×1=13500-135=13365
答
135*100-135也就是135乘以100再减去一个135
答
=125×(100-1)
=125×100-125×1
=12500-125
=12375
答
135×99
=135×(100-1)
=135×100-135×1
=13500-135
=13365
答
135*(100-1)=13500-135=13365