Addition with Regrouping Question
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Grade 2 Addition with Regrouping CCSS: 2.NBT.B.5
What is the rule for this input/output table? Explain how you found the rule.
| Input | Output |
|---|---|
| 12 | 31 |
| 25 | 44 |
| 38 | 57 |
| 71 | 90 |