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计算下面各题,能简算的请用简便方法计算.
5.6-4.28+6.O9
32-6.34-3.662.5+3.25+0.75+7.5.
人气:226 ℃ 时间:2020-01-30 03:10:11
解答

(1)5.6-4.28+6.O9,
=1.32+6.09,
=7.41;
(2)32-6.34-3.66,
=32-(6.34+3.66),
=32-10,
=22;
(3)2.5+3.25+0.75+7.5,
=(2.5+7.5)+(3.25+0.75),
=10+4,
=14.
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