Question

3.8乘2.7+38乘0.37的简便算法

Answer 1

把3.8扩大十倍变成38，然后2.7扩大十倍以保持值不变此时38是公因数，38×0.27+38×0.37然后你懂了吧~

Answer 2

3.8*2.7+38*0.37=38*0.27+38*0.37=38*(0.37+0.27)

Answer 3

=38*(0.37+0.27)=38*0.64 = 40*0.64-2*0.64 = 25.6 -1.28=24.32