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Question
Circle the correct addition fact (by using casting out nine).
6023 + 3203 = 9220
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Solution
6023 + 3203 = 9220
6023 + 3203 = 9220
2 + 8 = 4
10 = 4
1 + 0 = 4
1 = 4
The addition is not correct.
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| = | 11 |
| Multiply it by 9 | ×9 |
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