混合运算.(写出计算过程) 28.7-14.7÷1.4 0.25×4.56×40 (1.7+3.3÷5)×0.2 0.45+0.1
混合运算.(写出计算过程)28.7-14.7÷1.40.25×4.56×40(1.7+3.3÷5)×0.20.45+0.15×99712×0.25+8.8×2.5(3-1...
混合运算.(写出计算过程) 28.7-14.7÷1.4 0.25×4.56×40 (1.7+3.3÷5)×0.2 0.45+0.15×997 12×0.25+8.8×2.5 (3-1.6)÷2.5×0.1.
展开
1个回答
展开全部
(1)28.7-14.7÷1.4,
=28.7-10.5,
=18.2;
(2)0.25×4.56×40,
=(0.25×40)×4.56,
=10×4.56,
=45.6;
(3)(1.7+3.3÷5)×0.2,
=(1.7+0.66)×0.2,
=2.36×0.2,
=0.472;
(4)0.45+0.15×997,
=0.15×3+0.15×997,
=0.15×(3+997),
=0.15×1000,
=150;
(5)12×0.25+8.8×2.5,
=1.2×2.5+8.8×2.5,
=(1.2+8.8)×2.5,
=10×2.5,
=25;
(6)(3-1.6)÷2.5×0.1,
=1.4÷2.5×0.1,
=0.56×0.1,
=0.056.
=28.7-10.5,
=18.2;
(2)0.25×4.56×40,
=(0.25×40)×4.56,
=10×4.56,
=45.6;
(3)(1.7+3.3÷5)×0.2,
=(1.7+0.66)×0.2,
=2.36×0.2,
=0.472;
(4)0.45+0.15×997,
=0.15×3+0.15×997,
=0.15×(3+997),
=0.15×1000,
=150;
(5)12×0.25+8.8×2.5,
=1.2×2.5+8.8×2.5,
=(1.2+8.8)×2.5,
=10×2.5,
=25;
(6)(3-1.6)÷2.5×0.1,
=1.4÷2.5×0.1,
=0.56×0.1,
=0.056.
推荐律师服务:
若未解决您的问题,请您详细描述您的问题,通过百度律临进行免费专业咨询