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2789的24点怎么算?

2*(7+9)-8=24

共有2种方法!(7+9)*2-8=24(9+7)*2-8=24

1. [2*9+7]-8 2. [9+7*2]-8 3. [2*7+9]-8

2,7,8,9的24点答案:1:(2 * (7 + 9)) - 82:2 * (7 + 9) - 83:(2 * (9 + 7)) - 84:2 * (9 + 7) - 85:(7 + 9) * 2 - 86:((7 + 9) * 2) - 87:(9 + 7) * 2 - 88:((9 + 7) * 2) - 8

1: (2 * (7 + 9)) - 82: 2 * (7 + 9) - 83: (2 * (9 + 7)) - 84: 2 * (9 + 7) - 85: (7 + 9) * 2 - 86: ((7 + 9) * 2) - 87: (9 + 7) * 2 - 88: ((9 + 7) * 2) - 8谢谢

2789怎么算成241: (2 * (7 + 9)) - 82: 2 * (7 + 9) - 83: (2 * (9 + 7)) - 84: 2 * (9 + 7) - 85: (7 + 9) * 2 - 86: ((7 + 9) * 2) - 87: (9 + 7) * 2 - 88: ((9 + 7) * 2) - 8

2 7 8 9算24点的答案如下:(9+7)*2-8=24 望采纳谢谢!

1: (2 * (7 + 9)) - 82: 2 * (7 + 9) - 83: (2 * (9 + 7)) - 84: 2 * (9 + 7) - 85: (7 + 9) * 2 - 86: ((7 + 9) * 2) - 87: (9 + 7) * 2 - 88: ((9 + 7) * 2) - 8

(2*(9+7))-8=24(2*(7+9))-8=24((9+7)*2)-8=24((7+9)*2)-8=24

解:2 7 8 9=24,这样计算:(1)2x[8+√(7+9)]=242x[8+√(7+9)]=2x[8+√(16)]=2x(8+4)=2x12=24 (2)[(9+7)x2]-8=24 [(9+7)x2]-8=(16x2)-8=32-8=24

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