13.72×0.25+6.28÷4
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13.72×0.25+6.28÷4
13.72×0.25+6.28÷4
13.72×0.25+6.28÷4
13.72×0.25+6.28÷4
=13.72×0.25+6.28×0.25
=(13.72+6.28)×0.25
=20×0.25
=5
一个数乘0.25等于这个数除以4
13.72×0.25+6.28÷4
13.72*0.25+6.28÷4的简便运算方法
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