9 8 7 6 5 4 3 2 1=21
在空里填上+、-、*、/
人气:248 ℃ 时间:2019-10-29 14:52:00
解答
9 + 8 + 7 + 6 - 5 - 4 - 3 + 2 + 1=21
9 - 8 + 7 + 6 + 5 + 4 - 3 + 2 - 1=21
9 + 8 - 7 + 6 - 5 + 4 + 3 + 2 + 1=21
9 + 8 + 7 - 6 + 5 + 4 - 3 - 2 - 1=21
.
9 + 8 + 7 - 6 + 5 + 4 - 3 ×2 ÷1=21
9 x 8 x 7 ÷6 - 5 x 4 x 3 - 2 - 1=21
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