小学四则混合运算计算法则
- 时间:2020-04-18 15:05:39
- 分类:数学世界
- 阅读:147 次
七、小学四则混合运算计算法则:(四则运算指加、减、乘、除四种运算)
1、在没有括号的算式里,只有加减法或只有乘除法的,都要从左往右按顺序运算;
2、在没有括号的算式里,有乘除法和加减法的,要先算乘除再算加减;
3、算式里有括号的要先算括号里面的,再算括号外面的。(有小括号、中括号、大括号的,要先算小括号里的,再算中括号里的,再算大括号里的。)
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