Subtraction, take away "-", add "+", plus, Addition, add "+", take away "-", minus, Which number comes after 11?, 9, 10, 12, Which number comes after 15?, 17, 16, 14, Which number comes before 10?, 9, 7, 11, Which number comes before 19?, 18, 15, 20, Which pair makes 20?, 10+7, 10+10, 11+5, Which pair makes 12?, 6+7, 7+5, 10+5, How many tens are there in 10?, 1, 0, 10, How many tens are there in 30?, 3, 0, 5, “There were 12 oranges. I gave 5 away. ______ oranges are left.”, 12-5=7, 12-5=8, 12-5=6, There were 10 balloons. 3 popped. ______ balloons are left., 10+3=13, 10-3=7, 10-3=8.

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