11, 12, 14, 10, 10, 7, 8, 9, 15, 17, 18, 16, 16, 18, 17, 15, 11+13=24, 11+14=24, 11+30=24, 11+13=23, 180-90=90, 118-90=90, 108-19=89, 1,80-9,10=9,10, 20, 18, 19, 21, 6, 8, 7, 9, 5=9+14, 5+9=14, 5+9=40, 5-9=4, 17+70=87, 7+10+70=87, 70+17=87, 70+70=187

Basic Math Problems: Addition and Subtraction

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