46/73的分子,分母同时减去相同的数,约分后是11/20.减去的数是几?过程啊!
人气:302 ℃ 时间:2019-11-24 10:44:46
解答
用一一配对的方法:是分母20的倍数而又不少于73的数只有20 40 和60了,先从60看,分母和分子就是减去了73-60=13,那么减去后分子=46-13=33,减去后分母=73-13=60了,减去后分数33/60,33/60约分后不就是11/20了吗?
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