算24点,求有多少种算法我想知道下面3道题每道有多少种算法?不要列出来,只求多少种!1.67892.36893.6679

Question

算24点,求有多少种算法
我想知道下面3道题每道有多少种算法?不要列出来,只求多少种!
1.6 7 8 9
2.3 6 8 9
3.6 6 7 9

Answer 1

一.6 7 8 9
1:6 × (8 ÷ (9 - 7))
2:6 × 8 ÷(9 - 7)
3:(6 × 8) ÷ (9 - 7)
4:(6 ÷ (9 - 7)) × 8
5:6 ÷ (9 - 7) × 8
6:6 ÷ ((9 - 7) ÷ 8)
7:8 × (6 ÷ (9 - 7))
8:8 × 6 ÷(9 - 7)
9:(8 × 6) ÷ (9 - 7)
10:(8 ÷ (9 - 7)) × 6
11:8 ÷ (9 - 7) × 6
12:8 ÷ ((9 - 7) ÷ 6)
二.3 6 8 9
1:6 × (3 - 8 + 9)
2:6 × ((3 - 8) + 9)
3:6 × (3 - (8 - 9))
4:6 × (3 + 9 - 8)
5:6 × ((3 + 9) - 8)
6:6 × (3 + (9 - 8))
7:(6 - 9 ÷ 3) × 8
8:(6 - (9 ÷ 3)) × 8
9:6 × (9 + 3 - 8)
10:6 × ((9 + 3) - 8)
11:6 × (9 + (3 - 8))
12:6 × (9 - 8 + 3)
13:6 × ((9 - 8) + 3)
14:6 × (9 - (8 - 3))
15:(3 - 8 + 9) × 6
16:((3 - 8) + 9) × 6
17:(3 - (8 - 9)) × 6
18:(3 + 9 - 8) × 6
19:((3 + 9) - 8) × 6
20:(3 + (9 - 8)) × 6
21:(3 + 9) × (8 - 6)
22:(8 - 6) × (3 + 9)
23:(8 ÷ (6 - 3)) × 9
24:8 ÷ (6 - 3) × 9
25:8 ÷ ((6 - 3) ÷ 9)
26:(8 - 6) × (9 + 3)
27:8 × (6 - 9 ÷ 3)
28:8 × (6 - (9 ÷ 3))
29:8 × (9 ÷ (6 - 3))
30:8 × 9 ÷(6 - 3)
31:(8 × 9) ÷ (6 - 3)
32:(9 ÷ (6 - 3)) × 8
33:9 ÷ (6 - 3) × 8
34:9 ÷ ((6 - 3) ÷ 8)
35:(9 + 3 - 8) × 6
36:((9 + 3) - 8) × 6
37:(9 + (3 - 8)) × 6
38:(9 + 3) × (8 - 6)
39:9 × (8 ÷ (6 - 3))
40:9 × 8 ÷(6 - 3)
41:(9 × 8) ÷ (6 - 3)
42:(9 - 8 + 3) × 6
43:((9 - 8) + 3) × 6
44:(9 - (8 - 3)) × 6
三、6 6 7 9
1:6 × (6 + 7 - 9)
2:6 × ((6 + 7) - 9)
3:6 × (6 + (7 - 9))
4:(6 + 6) × (9 - 7)
5:6 × (6 - 9 + 7)
6:6 × ((6 - 9) + 7)
7:6 × (6 - (9 - 7))
8:6 × (7 + 6 - 9)
9:6 × ((7 + 6) - 9)
10:6 × (7 + (6 - 9))
11:(6 + 7 - 9) × 6
12:((6 + 7) - 9) × 6
13:(6 + (7 - 9)) × 6
14:6 × (7 - 9 + 6)
15:6 × ((7 - 9) + 6)
16:6 × (7 - (9 - 6))
17:(6 - 9 + 7) × 6
18:((6 - 9) + 7) × 6
19:(6 - (9 - 7)) × 6
20:(7 + 6 - 9) × 6
21:((7 + 6) - 9) × 6
22:(7 + (6 - 9)) × 6
23:(7 - 9 + 6) × 6
24:((7 - 9) + 6) × 6
25:(7 - (9 - 6)) × 6
26:(9 - 7) × (6 + 6)