Grade 2/Addition
Adding whole hundreds (2 addends) (217)
Add two multiples of 100 (whole hundreds) to build quick place value fluency.
12
Sheets
0
Views
0
Downloads
Preview
Click to preview collection
Quick Tip
Think in hundreds: add the hundreds digits, then tag on two zeros.
Teacher Resources
Teaching Notes
Extension of adding tens to hundreds. Emphasize place value: we are adding hundreds, not ones. Connect to money (3 hundred-dollar bills + 5 hundred-dollar bills). Show pattern: adding hundreds is just like adding ones, but with two zeros.
Vocabulary
Whole hundreds: Numbers like 100, 200, 300, ending in two zeros.
Place value: The value of a digit based on its position.
Common Mistakes
- Writing wrong number of zeros (80 instead of 800)
- Adding like ones (3+5=8 and forgetting hundreds)
- Confusing hundreds with thousands
- Not understanding place value
- Forgetting to include the two zeros in the answer (e.g., 300 + 200 = 5 instead of 500)
- Misunderstanding the value of digits in the hundreds place
Differentiation
SupportUse concrete manipulatives like base ten blocks or a number line to skip count by 100s. Relate to counting money (e.g., $300 + $200).
ChallengeIntroduce adding three whole hundreds or adding a whole hundred to a number with tens and ones (e.g., 300 + 150). Challenge with missing addend problems (e.g., 400 + ___ = 700).
Discussion Questions
- How is adding 300 + 200 similar to adding 3 + 2?
- What patterns do you notice when adding whole hundreds?
- Can you think of a real-life situation where you would add whole hundreds?
Extension Activities
- Add 3 whole hundreds.
- Add whole thousands.
- Use base-ten blocks.
Parent Tip
Ask your child to count by hundreds up to 1000.
Learning Path
Skill Cluster
Number Sense & Place Value
Estimated Time
15 minutes
Skills Practiced
adding whole hundredsplace value understandingaddition properties
Prerequisites
- Skip counting by 100s to 1000
- Basic addition facts within 20
- Understanding place value (hundreds, tens, ones)
Next Steps
- Adding multiples of 10 (2 addends)
- Adding whole hundreds to other 3-digit numbers (e.g., 300 + 125)
- Adding 3-digit numbers without regrouping