Question

5 5 5 1 1 必须用 + —×÷ 如何得24?

Answer 1

[5/1+(-1/5)]*5

=[5-1/5]*5

=[25/5-1/5]*5

=[24/5]*5

=24

+ —×÷都有,应是这样的,太难了,我做了半天．