就是连续的做除法就行,
(1/2) / (1/2) / (1/2) / (1/2) = (1/2) * 2 * 2 * 2 = 4
第一个除号也可以换成加号,并加上括号,就是
(1/2 + 1/2) / (1/2) / (1/2)
= 1 / (1/2) / (1/2) = 4
都行.