脱式计算。(能简算的要简算)(1)45÷0.75-(15+7.5×0.6)(2)5.25×8.2+5.25×0.8-5.25(3)18.45-(3.8×2.7+5.3)(4)--+-五年级数学

题目简介

脱式计算。(能简算的要简算)(1)45÷0.75-(15+7.5×0.6)(2)5.25×8.2+5.25×0.8-5.25(3)18.45-(3.8×2.7+5.3)(4)--+-五年级数学

题目详情

脱式计算。(能简算的要简算)
(1)45÷0.75-(15+7.5×0.6)(2)5.25×8.2+5.25×0.8-5.25
(3)18.45 -(3.8×2.7+5.3)(4)+
题型:计算题难度:中档来源:期末题

答案

(1)45÷0.75-(15+7.5×0.6)
  = 60-(15+4.5)
  =60-19.5
  =40.5

(2)5.25×8.2+5.25×0.8-5.25
  =43.05+4.2-5.25
  =42
 

(3)18.45-(3.8×2.7+5.3)
  =18.45-(10.26+5.3)
  =18.45-15.56
  =2.89
 
 
 

(4)
=--(-)
=
=

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