| 1 a. |
_________ – 1200 = 1400
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| 1 b. |
_________ – 4700 = 2800
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| 2 a. |
_________ – 3900 = 2500
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| 2 b. |
8800 – _________ = 200
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| 3 a. |
2500 – _________ = 600
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| 3 b. |
_________ – 3200 = 2300
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| 4 a. |
8900 – _________ = 1400
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| 4 b. |
4600 – _________ = 1300
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| 5 a. |
_________ – 2200 = 1700
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| 5 b. |
_________ – 5200 = 2800
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| 6 a. |
2600 – _________ = 1200
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| 6 b. |
3100 – _________ = 200
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| 7 a. |
_________ – 6300 = 1700
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| 7 b. |
_________ – 8100 = 900
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| 8 a. |
9300 – _________ = 400
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| 8 b. |
6700 – _________ = 800
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| 9 a. |
_________ – 8800 = 800
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| 9 b. |
_________ – 6200 = 1300
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