(1-五分之四)/九分之五+(13.8-13)/九分之五 简便计算
人气:149 ℃ 时间:2020-06-15 12:49:37
解答
(1-五分之四)/九分之五+(13.8-13)/九分之五
=(1-4/5+13.8-13)×9/5
=(13.8-4/5-13+1)×9/5
=1×9/5
=9/5
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