1) 5 + 9 = 14 a) addition b) subtraction  2) 3 - 10 = 7 a) addition b) subtraction  3) 10 + 10 = 20 a) addition b) subtraction  4) 10 - 10 = 0 a) addition b) subtraction  5) 15 - 8 = 7 a) addition b) subtraction  6) 20 - 7 = 13 a) addition b) subtraction  7) 18 - 2 = 16 a) addition b) subtraction  8) 14 + 2 = 16 a) addition b) subtraction  9) 10 + 5 = 15 a) addition b) subtraction  10) 7 - 5 = 2 a) addition b) subtraction 

Addition and subtraction

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