添括号,使等式成立20+30×12-6=20020+30×12-6=30020+30×12-6=37420+30×12-6=594
来源:学生作业帮助网 编辑:作业帮 时间:2024/06/30 01:09:51
![添括号,使等式成立20+30×12-6=20020+30×12-6=30020+30×12-6=37420+30×12-6=594](/uploads/image/z/1094151-39-1.jpg?t=%E6%B7%BB%E6%8B%AC%E5%8F%B7%2C%E4%BD%BF%E7%AD%89%E5%BC%8F%E6%88%90%E7%AB%8B20%2B30%C3%9712-6%3D20020%2B30%C3%9712-6%3D30020%2B30%C3%9712-6%3D37420%2B30%C3%9712-6%3D594)
添括号,使等式成立20+30×12-6=20020+30×12-6=30020+30×12-6=37420+30×12-6=594
添括号,使等式成立
20+30×12-6=200
20+30×12-6=300
20+30×12-6=374
20+30×12-6=594
添括号,使等式成立20+30×12-6=20020+30×12-6=30020+30×12-6=37420+30×12-6=594
20+30×(12-6)=200
(20+30)×(12-6)=300
20+(30×12)-6=374
(20+30)×12-6=594