趣味數學(3)

數字奇觀

這裏盡是2 的系列, 但是如果適當地放入四則運算符號(+-x÷), 則可以得出一個順序的答案,0, 1, ..., 6,真是有趣極了!你現在就試試吧!

(1)	2	2	2	2	=	0
(2)	2	2	2	2	=	1
(3)	2	2	2	2	=	2
(4)	2	2	2	2	=	3
(5)	2	2	2	2	=	4
(6)	2	2	2	2	=	5
(7)	2	2	2	2	=	6

解答如下:

(1)	2 + 2 - 2 - 2	=	0
(2)	(2 ÷ 2) × (2 ÷ 2)	=	1
(3)	(2 ÷ 2) + (2 ÷ 2)	=	2
(4)	(2 + 2 + 2) ÷ 2	=	3
(5)	2 × 2 ÷ 2 + 2	=	4
(6)	2 + 2 + (2 ÷ 2)	=	5
(7)	(2 × 2 × 2) - 2	=	6