计算下面各题. 13/4÷2+30×12.5% 40%×13+87×0.4.
问题描述:
计算下面各题.
÷2+30×12.5%13 4
40%×13+87×0.4.
答
(1)
÷2+30×12.5%13 4
=
×13 4
+30×1 2
,1 8
=
+13 8
,30 8
=
;43 8
(2)40%×13+87×0.4
=0.4×13+87×0.4,
=(13+37)×0.4,
=50×0.4,
=20.