问题
解答题
用递等式计算下面各题.
(1)9.6×4.5+1.5
(2)0.9-0.25×0.18
(3)(1.25+18.5)×0.63
(4)0.75×16×5.2
(5)0.15×(9.3-3.9)
(6)0.63×1.6×20.
答案
(1)9.6×4.5+1.5,
=43.2+1.5,
=44.7;
(2)0.9-0.25×0.18,
=0.9-0.045,
=0.855;
(3)(1.25+18.5)×0.63,
=19.75×0.63,
=12.4425;
(4)0.75×16×5.2,
=12×5.2,
=62.4;
(5)0.15×(9.3-3.9),
=0.15×5.4,
=0.81;
(6)0.63×1.6×20,
=1.008×20,
=20.16.