计算。(1)0.4×[÷2×(4.3-1.8)](2)23.3×(2-75%)+(1+25%)×27.7-3×1(3)3.14-6.28+9.42-12.56+15.7-18.84+47.1(4)42×(+++++)-六年级数学

题文

计算。
(1)0.4×[÷2×(4.3-1.8)] (2)23.3×(2-75%)+(1+25%)×27.7-3×1
(3)3.14-6.28+9.42-12.56+15.7-18.84+47.1 (4)42×(+++++
题型:计算题  难度:中档

答案

(1)原式=0.4×(××2.5)
                =0.4×
                =
(2)原式=23.3×1.25+1.25×27.7-3×1.25
                =1.25×(23.3+27.7-3)
                =1.25×48
                =60
(3)原式=(3.14+9.42+15.7+47.1)-(6.28+12.56+18.84)
                =37.68   
(4)原式= 42×(+++++
                =×(1+++++
                =×(21+7++++1)
                =×36
                =9
  • 最新内容
  • 相关内容
  • 网友推荐
  • 图文推荐