Question

1234567,2345671,3456712,4567123,5671234,6712345,7123456,加减乘除

Answer 1

1*2+3*4+5*6+7=51

2*(3+4+5+6+7)+1=51

3*4+5*6+7+1*2=51

4+5+6*7+1+2-3=51

5*6+7+1*2+3*4=51