问几道数学有理数计算
问题描述:
问几道数学有理数计算
①(-6)×(-0.25)×11/14
②-7×(-3)×(-0.5)+(-12)×(-2.6)
答
6×0.25×11/14
=3/2×11/14
=33/28 -7×3×0.5+12×2.6
=-10.5+31.2
=20.7