五年级上册数学 简便运算混合计算

五年级上册数学 简便运算混合计算


简介:
8-2.45-1.55 =8-(2.45+1.55) =8-4 =4 0.32×403 =0.32×(400+3) =0.32×400+0.32×3 =128+0.96 =128.96 0.25×36 =0.25×4×9 =1×9 =9 12.7-(3.7+0.84) =12.7-3.7-0.84 =9-0.84 =8.14 3.25+1.79-0.59+1.75 =(3.25+1.75)+(1.79-0.59) =5+1.2 =6.2 23.4-0.8-13.4-7.2 =(23.4-13.4)-0.8-7.2 =10-(0.8+7.2) =10-8 =2