用加減乘除及括號
3,3,7,7 點樣計 24
點樣計 24~超急就快爆石~
2009-01-10 6:36 am
回答 (7)
2009-01-10 4:37 pm
✔ 最佳答案
加減乘除及括號，如果無限使用的次數，3,3,7,7 計 24 的方法:(1) 計 2 4 ---- (?) 3 (?) 3 (?) 7 (? )7 = (?) 2 (?) 4
a. 3 + 3 - 7 - 7 = -2 x 4 或
- 3 - 3 + 7 + 7 = 2 x -4 ，如此類推
b. 3 / 3 + 7 / 7 = - 2 + 4, 或
- (3 / 3) - (7 / 7) = 2 - 4 ，如此類推
c. 3 + 3 + 7 - 7 = 2 + 4 , 或
- 3 - 3 - 7 + 7 = - 2 - 4 , 如此類推
d. (3 + 3) x 7 / 7 = 2 + 4 ，或
-(3 + 3) x 7 / 7 = - 2 - 4 , 如此類推
(2) 計 24 ------(?) 3 (?) 3 (?) 7 (?) 7 = 24
e. (3 + 3 / 7 ) x 7 = 24 , 或
-(3 + 3 / 7 ) x -7 = 24 ， 如此類推
2009-01-12 04:08:03 補充：
3x(3+7/7)
= 3x(3+1)
= 3x4
= 12 =/= 24
2009-01-13 8:49 pm
太easy了﹗是3 3/7x7。你好笨啊，「唔劉心」﹗
2009-01-10 6:44 pm
計 2 4
a. 3 + 3 - 7 - 7 = -2 x 4 /
- 3 - 3 + 7 + 7 = 2 x -4
b. 3 / 3 + 7 / 7 = - 2 + 4 /
- (3 / 3) - (7 / 7) = 2 - 4
c. 3 + 3 + 7 - 7 = 2 + 4 /
- 3 - 3 - 7 + 7 = - 2 - 4
d. (3 + 3) x 7 / 7 = 2 + 4 /
-(3 + 3) x 7 / 7 = - 2 - 4
e. (3 + 3 / 7 ) x 7 = 24 /
-(3 + 3 / 7 ) x -7 = 24
a. 3 + 3 - 7 - 7 = -2 x 4 /
- 3 - 3 + 7 + 7 = 2 x -4
b. 3 / 3 + 7 / 7 = - 2 + 4 /
- (3 / 3) - (7 / 7) = 2 - 4
c. 3 + 3 + 7 - 7 = 2 + 4 /
- 3 - 3 - 7 + 7 = - 2 - 4
d. (3 + 3) x 7 / 7 = 2 + 4 /
-(3 + 3) x 7 / 7 = - 2 - 4
e. (3 + 3 / 7 ) x 7 = 24 /
-(3 + 3 / 7 ) x -7 = 24
參考: myself
2009-01-10 7:22 am
咁唔好忍啦~對身體唔好啦
2009-01-10 6:39 am
(3+3/7)x7=24 (do the devision first)
2009-01-09 22:45:27 補充：
One more
3x(3+7/7)
2009-01-10 10:47:24 補充：
-(3+3/7)x-7
2009-01-09 22:45:27 補充：
One more
3x(3+7/7)
2009-01-10 10:47:24 補充：
-(3+3/7)x-7
參考: my brain, my brain
收錄日期: 2021-04-15 19:38:48
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