4x(5+9-8)
=4x6
=24
你好!
用4,5,8,9算24点,共有22种演算法。
[9-﹙8-5﹚]×4
[﹙9-5﹚×4]+8
[﹙5-8﹚+9]×4
[5+﹙9-8﹚]×4
[4×﹙9-5﹚]+8
4×[﹙5-8﹚+9]
4×[9-﹙8-5﹚]
4×[﹙9-8﹚+5]
8+[﹙9-5﹚×4]
[﹙9-8﹚+5]×4
4×[﹙9+5﹚-8]
4×[5+﹙9-8﹚]
8-[4×﹙5-9﹚]
4×[﹙5+9﹚-8]
4×[9+﹙5-8﹚]
[5-﹙8-9﹚]×4
4×[5-﹙8-9﹚]
[﹙9+5﹚-8]×4
8+[4×﹙9-5﹚]
[9+﹙5-8﹚]×4
8-[﹙5-9﹚×4]
[﹙5+9﹚-8]×4
9乘以10减去7乘以8==
1: (5 - 7 ÷ 7) × 6 2: (5 - [7 ÷ 7)] × 6 3: 6 × (5 - 7 ÷ 7) 4: 6 × [5 - (7 ÷ 7)] 顺便给你个网址,算24点的:dffy./tool/24.htm
4×(9-1-2)=24
(2x9-15)x8
8/(3-(8/3))
8/(3-(8/3))
8/(3-(8/3))
8/(3-(8/3))
8×(7-3-1),
=8×3,
=24;
故答案为:8×(7-3-1).
(7÷1-4)*8=24
(7+3-2)×3,
=8×3,
=24,
故答案为:(7+3-2)×3