Shows 2nd grade students how to add two-digit numbers when the ones add up to ten or more, using column addition with a carried ten and the jump strategy as a mental check. Includes a tens-and-ones table, worked examples and the two mistakes children make most often.
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Curriculum: Texas grade levels (TEKS). We show specific outcome codes only where they have been verified against the official curriculum document.
Completed: Addition with Regrouping
2nd Grade students (typically ages 7–8) working on addition. It is pitched at level 1 · easier.
This is a study guide, so there is no separate answer sheet; the 'Check yourself' questions include answers.
About 10 minutes. Short, regular sessions work best: two or three a week beats one long one.
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Try 2nd Grade Number Bonds Worksheet — Getting Started.
Success TutoringWorksheets2nd Grade · Mathematics · AdditionWhen we add two-digit numbers, we add the ones first and then the tens. Sometimes the ones add up to 10 or more. When that happens we regroup (your teacher might say trade or carry): 10 ones become 1 ten, and we move that ten into the tens column.
Regrouping only makes sense if you remember what each digit is worth. In 47, the 4 means 4 tens (40) and the 7 means 7 ones.
| Number | Tens | Ones |
|---|---|---|
| 47 | 4 | 7 |
| 25 | 2 | 5 |
| 60 | 6 | 0 |
| 18 | 1 | 8 |
47 + 25 in columns
38 + 6 (adding a one-digit number)
Another way: the jump strategy. You can also add in your head by jumping along a number line. Add the tens first, then the ones. This is a great way to check a column answer.
56 + 27 using the jump strategy
Answers: 1. 43 2. 84 3. 65 4. 92 5. 36 6. No (3 + 5 = 8, which is less than 10); the total is 68.
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