计算下面各题:(1)20.02×67+3.2×200.2+400.4×0.05(2)13+115+135+163+199.-数学
题文
计算下面各题: (1)20.02×67+3.2×200.2+400.4×0.05 (2)
|
答案
(1)20.02×67+3.2×200.2+400.4×0.05 =200.2×6.7+3.2×200.2+200.2×2×0.05 =200.2×6.7+3.2×200.2+200.2×0.1 =200.2×(6.7+3.2+0.1) =200.2×10 =2002, (2)
=
=
|