1) more a) addition b) subtraction 2) left a) addition b) subtraction 3) minus a) addition b) subtraction 4) altogether a) addition b) subtraction 5) plus a) addition b) subtraction 6) difference a) addition b) subtraction 7) total a) addition b) subtraction 8) Addition a) numbers become bigger b) numbers become smaller 9) Subtraction a) numbers become bigger b) numbers become smaller

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