Question

在4个1/2中间加上“+”,“—”等符号,使之组成分别等于0,1,2,3,4,五个等式吗?

Answer 1

1/2+1/2-1/2-1/2=0

1/2+1/2+1/2-1/2=1

1/2+1/2+1/2+1/2=2

(1/2+1/2+1/2)÷1/2=3

(1/2+1/2)÷(1/2*1/2)=4