Adding and Subtracting

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Presentation transcript:

Adding and Subtracting Step One: Keep the columns straight! 12 43 89 52 61 +14 - 21 - 45 +24 + 47

Adding and Subtracting Step Two: Start add or subtracting from the one column! 12 43 89 52 61 +14 - 21 - 45 +24 + 47 6 2 4 6 8

Adding and Subtracting Step Three: Start add or subtracting from the tens column! 12 43 89 52 61 +14 - 21 - 45 +24 + 47 2 6 2 2 4 4 7 6 108