Question

3.26x5.3+7.4x0.53怎么简便计算？

Answer 1

3.26x5.3+7.4x0.53
=32.6x0.53+7.4x0.53
=0.53x（32.6+7.4）
=0.53X40
=21.2

Answer 2

3.26x5.3+7.4x0.53
=5.3×（3.26+0.74）
=5.3×4
=21.2
运用乘法分配律。