33乘以1.03 简便计算 (1.25加1.25加1.25)乘以5加8.75乘以15简便计算.

问题描述:

33乘以1.03 简便计算 (1.25加1.25加1.25)乘以5加8.75乘以15简便计算.

此题运用了乘法的分配律
①原式=33 x (1+0.03)
=33 x 1 + 33 x 0.03
=33+0.99
=33.99
②原式=1.25 x3 x5+8.75 x15
=1.25x 15+8.75 x15
=(1.25+8.75)x15
=10x 15
=150

33乘以1.03 简便计算 = 33 x 1 + 33 x 0.03= 33 + 0.99= 33.99(1.25加1.25加1.25)乘以5加8.75乘以15简便计算.= 1.25 x3 x 5 + 8.75 x 15= 1.25 x15 + 8.75 x 15= 15 x ( 1.25 + 8.75) = 15 x 10 =15 0施...