2 1 point game rules: each number is only used once, but the order can be changed. Only four operations such as addition, subtraction, multiplication and division are allowed, and the order of operations can be changed by brackets.
Use 5, 7, 9, 1 1 to calculate 24 points. * * * There are four algorithms.
1.
﹙ 1 1-9﹚×﹙7+5﹚
2.
﹙5+7﹚×﹙ 1 1-9﹚
3.
﹙ 1 1-9﹚×﹙5+7﹚
4.
﹙7+5﹚×﹙ 1 1-9﹚
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