2/1 2/1 2/1 2/1 2/1 2/1 2/1=10填加减乘除括号

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2/12/12/12/12/12/12/1=10填加减乘除括号2/12/12/12/12/12/12/1=10填加减乘除括号2/12/12/12/12/12/12/1=10填加减乘除括号2/1+2/1

2/1 2/1 2/1 2/1 2/1 2/1 2/1=10填加减乘除括号
2/1 2/1 2/1 2/1 2/1 2/1 2/1=10填加减乘除括号

2/1 2/1 2/1 2/1 2/1 2/1 2/1=10填加减乘除括号
2/1+ 2/1 +2/1 +2/1+ 2/1 +2/1- 2/1=10

(2+2)/2+2*2+2+2=10