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:128 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?

推荐阅读:
5 Ways a Blog Can Help Your Business Grow  How to Create Killer Project Proposals to Land Five-Figure Blogg  Why Local SEO Is the Best Option for Promoting Your Website  Greedy Algorithm to Group the Numbers/Items Given the Group Size  Design A Leaderboard using Priority Queue, Hash Map (unordered_m  5 Innovative Ways Ecommerce Businesses Are Leveraging Machine Le  How to Compute the Catalan Numbers using Dynamic Programming Alg  C++ Coding Reference: Partial Sorting with nth_element from Algo  Microbit Programming: Introduction to AI – Letting Compute  Subtract the Product and Sum of Digits of an Integer 
评论列表
添加评论