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15 questions
-6 + 14
-15 + 24
28 + ( -14 )
16 + ( -14 )
-12 + 8
-29 + 30
27 + ( -19 )
14 + ( -27 )
-25 + ( 3 )
-21 + ( 30 )
-7 + ( -6 )
-11 + ( -14 )
-28 + ( -11 )
-25 + ( -9 )
-18 + ( -23 )
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