➕ Topic Summary
Adding 2-digit numbers with regrouping (or carrying) means adding the ones column first. If the sum is 10 or more, we 'regroup' by carrying the tens digit over to the tens column. Then we add the tens column, including the regrouped digit. It's all about keeping those place values straight!
🧮 Part A: Vocabulary
Match the terms with their definitions. Write the correct letter in the blank.
- ____ Regrouping
- ____ Sum
- ____ Digit
- ____ Place Value
- ____ Addend
- A symbol used to show a number (0-9)
- The value of a digit based on its position in a number.
- The answer to an addition problem.
- To exchange amounts when renaming a number.
- A number that is being added.
✏️ Part B: Fill in the Blanks
When adding 2-digit numbers, always start with the ______ column. If the sum of the ones column is greater than ______, you need to regroup. This means you carry the ______ digit to the tens column. Then, add the ______ column, including the regrouped number.
🤔 Part C: Critical Thinking
Explain in your own words why regrouping is important when adding multi-digit numbers. Give an example.