Question

列出算式,共有四题.1.一台洗衣机降价百分之15.每台售价1020元.这台洗衣机原价多少. 2.一批水泥,运走了160吨

Answer 1

1. 1020/(1-85%)

2. 160/(1-20%)

3. (20*80%)/(40%)

4. [30/(120%-1)]/(30%)