问题
解答题
用你喜欢的方法计算.
7.28+(1.72-0.5)
2.25×4.8+7.75×4.8.
答案
(1)7.28+(1.72-0.5),
=7.28+1.72-0.5,
=9-0.5,
=8.5;
(2)2.25×4.8+7.75×4.8,
=(2.25+7.75)×4.8,
=10×4.8,
=48.
用你喜欢的方法计算.
7.28+(1.72-0.5)
2.25×4.8+7.75×4.8.
(1)7.28+(1.72-0.5),
=7.28+1.72-0.5,
=9-0.5,
=8.5;
(2)2.25×4.8+7.75×4.8,
=(2.25+7.75)×4.8,
=10×4.8,
=48.