1.用简便算法计算下题:(1)135×99 = = =

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1.用简便算法计算下题:(1)135×99 = = =

1.用简便算法计算下题:(1)135×99 = = =
1.用简便算法计算下题:(1)135×99 = = =

1.用简便算法计算下题:(1)135×99 = = =
135×99
=135×(100-1)
=135×100-135×1
=13500-135
=13365

=125×(100-1)
=125×100-125×1
=12500-125
=12375

135×100-135

135*(100-1)=13500-135=13365

135*100-135也就是135乘以100再减去一个135

135×99=135×(100-1)=135×100-135×1=13500-135=13365