①4 6 7 9
1:6 ÷ 4 ×(7 + 9)
2:(6 ÷ 4) × (7 + 9)
3:6 ÷ (4 ÷ (7 + 9))
4:6 ÷ 4 ×(9 + 7)
5:(6 ÷ 4) × (9 + 7)
6:6 ÷ (4 ÷ (9 + 7))
7:(6 × (7 + 9)) ÷ 4
8:6 × (7 + 9) ÷ 4
9:6 × ((7 + 9) ÷ 4)
10:(6 × (9 + 7)) ÷ 4
11:6 × (9 + 7) ÷ 4
12:6 × ((9 + 7) ÷ 4)
13:(7 + 9) ÷ 4 × 6
14:((7 + 9) ÷ 4) × 6
15:(7 + 9) ÷ (4 ÷ 6)
16:(7 + 9) × 6 ÷ 4
17:((7 + 9) × 6) ÷ 4
18:(7 + 9) × (6 ÷ 4)
19:(9 + 7) ÷ 4 × 6
20:((9 + 7) ÷ 4) × 6
21:(9 + 7) ÷ (4 ÷ 6)
22:(9 + 7) × 6 ÷ 4
23:((9 + 7) × 6) ÷ 4
24:(9 + 7) × (6 ÷ 4)
② 4 7 7 9
对不起 没有答案