因为A与B互为相反数,所以A+B=0
因为C为绝对值最小的数,|所以C=0
所以
|m|分之|A+B|减C+|m|
=|m|分之0-0+|m|
=|m|分之|m|
=1
或
|m|分之|A+B|减C+|m|
=|m|分之0-0+|m|
=0-0+|m|
=|m|
=±3