数学题125×0.1999+2×1.25×19.99+1250×0.01999
问题描述：
数学题125×0.1999+2×1.25×19.99+1250×0.01999
答
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