计算3.14×67+8.2×31.4-90×0.314 &nb
来源:学生作业帮 编辑:作业帮 分类:数学作业 时间:2024/11/01 08:15:22
计算
3.14×67+8.2×31.4-90×0.314
12.65÷12.5÷0.8
(32×0.63×0.95)÷(1.6×21×1.9)
3.14×67+8.2×31.4-90×0.314
12.65÷12.5÷0.8
(32×0.63×0.95)÷(1.6×21×1.9)
(1)3.14×67+8.2×31.4-90×0.314
=3.14×67+82×3.14-9×3.14
=3.14×(67+82-9)
=31.4×140
=439.6
(2)12.65÷12.5÷0.8
=12.65÷(12.5×0.8)
=12.65÷10
=1.265
(3)(32×0.63×0.95)÷(1.6×21×1.9)
=(32÷1.6)×(0.63÷21)×(0.95÷1.9)
=20×0.03×0.5
=0.3
=3.14×67+82×3.14-9×3.14
=3.14×(67+82-9)
=31.4×140
=439.6
(2)12.65÷12.5÷0.8
=12.65÷(12.5×0.8)
=12.65÷10
=1.265
(3)(32×0.63×0.95)÷(1.6×21×1.9)
=(32÷1.6)×(0.63÷21)×(0.95÷1.9)
=20×0.03×0.5
=0.3