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简介:
( )−65=311
( )−534=64
( )−21=671
( )−876=12
( )−172=11
( )−654=33
( )−332=23
( )−223=45
( )+12=367
( )+21=149
( )−74=213
( )−66=622
( )+15=946
( )+35=949
( )+52=288
( )−151=200
( )−110=450
( )−350=640
( )−260=410
( )−687=300
( )−507=400
( )−165=200
( )−288=700
( )−500=104