-1,+3,-5,4,怎么运用学过的法则算成24?
问题描述:
-1,+3,-5,4,怎么运用学过的法则算成24?
答
(4+(-1))*(3-(-5))
=3*8=24
答
[-1-(-5-4)]*3=24
答
3x[4-1-(-5)]=24