"82+63等于几"...82+63等于几
"82-71等于几"...82-71等于几
"82-81等于几"...82-81等于几
"82-68等于几"...82-68等于几
"82+68等于几"...82+68等于几
"82-78等于几"...82-78等于几
"82-几=6"...82-几=6
"82+78等于几"...82+78等于几
"82-37-63等于几"...82-37-63等于几
"81+82+83等于几"...81+82+83等于几
