4,8,9,2加减乘除如何等于24
问题描述：
4,8,9,2加减乘除如何等于24
答
（9-4-2）*8
答
也只有这种了
答
1: 8 × (9 - (4 + 2))
2: 8 × (9 - 4 - 2)
3: 8 × ((9 - 4) - 2)
4: 8 × (9 - (2 + 4))
5: 8 × (9 - 2 - 4)
6: 8 × ((9 - 2) - 4)
7: (9 - (4 + 2)) × 8
8: (9 - 4 - 2) × 8
9: ((9 - 4) - 2) × 8
10: (9 - (2 + 4)) × 8
11: (9 - 2 - 4) × 8
12: ((9 - 2) - 4) × 8
答
8 × (9 - 4 - 2)=24
答
8×（9－4－2）＝8×3＝24
答
8*(9-2-4)=24