关于连减的简便计算的几种题型
- 时间:2020-04-19 17:21:44
- 分类:数学世界
- 阅读:151 次
关于连减的简便计算的几种题型:连减的简便计算主要有两种题型:
一是先算出后两个数的和,再用被减数去减,如:612-245-55,可以写成:
612-245-55
=612-(245+55)
=612-300
=312
延伸的题目还有如:978-25-25-50,可以把后面三个减数先加起来,再减它们的和。
978-25-25-50
=978-(25+25+50)
=978-100
=878
第二种题型:先减去第三个数,再减第二个数,如:674-135-74,可以这样算
674-135-74
=674-74-135
=600-135
=465
延伸的题目有如:934-63-137-234,可以同时用到上面的两种简便方法。你会做吗?
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