➕ Topic Summary
Addition and subtraction with numbers up to 1000, involving regrouping (or borrowing), is a key skill in 2nd grade. Regrouping is necessary when the digit you're subtracting from is smaller than the digit you're subtracting. In addition, you regroup when the sum of digits in a place value column is greater than 9. Practice helps build confidence and accuracy!
🗣️ Part A: Vocabulary
Match the term to its definition:
- Term: Sum
- Term: Difference
- Term: Regrouping
- Term: Place Value
- Term: Addend
- Definition: The value of a digit based on its position in a number.
- Definition: A number that is added to another.
- Definition: The result of subtracting one number from another.
- Definition: The result of adding two or more numbers.
- Definition: To exchange amounts when adding or subtracting, like carrying over or borrowing.
✍️ Part B: Fill in the Blanks
When we _______ numbers, we find their total. If the sum in the ones place is greater than 9, we need to _______. When we _______, we find the amount left over. If a digit in the top number is smaller than the digit below it, we need to _______ from the next place value.
🤔 Part C: Critical Thinking
Explain in your own words why regrouping is important when adding or subtracting large numbers.