2.8/25%简便运算

题目

2.8/25%简便运算
1...2.8/25％
2...3.7*99％+0.037*1

答案

2.8/25％
=2.8÷(1÷4)
=2.8÷1×4
=2.8×4
=11.2
3.7*99％+0.037*1
=3.7×0.99+3.7×0.01
=3.7×(0.99+0.01)
=3.7×1
=3.7