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用简便方法计算.11.56-(1.56+0.25)22.5×0.59+7.75×5.9.

题目详情
用简便方法计算.
11.56-(1.56+0.25) 22.5×0.59+7.75×5.9.
▼优质解答
答案和解析

(1)11.56-(1.56+0.25),
=11.56-1.56-0.25,
=10-0.25,
=9.75;

(2)22.5×0.59+7.75×5.9,
=2.25×5.9+7.75×5.9,
=(2.25+7.75)×5.9,
=10×5.9,
=59.