作业帮 > 数学 > 作业

数学题125×0.1999+2×1.25×19.99+1250×0.01999

来源:学生作业帮 编辑:作业帮 分类:数学作业 时间:2024/05/23 14:09:05
数学题125×0.1999+2×1.25×19.99+1250×0.01999
125×0.1999+2×1.25×19.99+1250×0.01999
=125×0.1999+2×1.25×19.99+1250×0.01999
=1.25X19.99+2X1.25X19.99+1.25X19.99
=19.99X(1.25+2X1.25+1.25)
=19.99X5
=20X5-0.01X5
=100-0.05
=99.5