分数的写法,分子/分母 ；四分之一,1/4 = 0.25 ；题目你有没有写错啊?1/2 + 3/4 + 7/8 + 15/16 + 31/32 + 63/64= 1/2 + (2+1)/4 + (6+1)/8 + (14+1)/16 + (30+1)/32 + (62+1)/64= 1/2 + 1/2 + (1/4 + 3/4) + (1/8 + 7...