3.4除以中括号0.85乘小括号1.4减1.2小括号中括号怎么简便计算

简便计算
2025-02-27 18:21:57
推荐回答(1个)
回答1:

3.4÷[0.85×(1.4-1.2)]
=3.4÷(0.85×0.2)
=3.4÷0.17
=(3.4×100)÷(0.17×100)
=340÷17
=20