Grade 2 Addition Within 100 - Medium
A medium grade 2 worksheet for Addition.
Worksheet snapshot
- Addition (within 100)
- Key concepts: Understanding core addition (within 10) concepts for Grade 2; Applying addition (within 10) strategies appropriate to Grade 2
- Students develop fluency with addition (within 10) at Grade 2 level, applying strategies more independently and solving increasingly complex problems.
- Apply it: Addition (within 10) at the Grade 2 level connects to everyday situations students encounter: problem-solving in daily life, making sense of quantities and relationships, and building mathematical literacy for future learning.
- 60 + 80 =
- 79 + 27 =
- 53 + 51 =
About Addition (within 10)
Addition is the mathematical operation of combining quantities or putting groups together. It forms the foundation for all arithmetic and is essential for everyday problem-solving involving 'how many altogether' or 'what is the total' situations.
Addition is one of the four fundamental operations in mathematics. It's essential for everyday tasks like shopping, measuring, telling time, and handling money. Strong addition skills support learning multi-digit computation, fractions, algebra, and problem-solving across all math domains.
Addition (within 100)
Add two-digit numbers within 100 using place value, partial sums, and regrouping; solve one- and two-step problems.
This medium level worksheet:
Add two 2-digit numbers with one regroup; record partial sums of tens and ones.
Key Concepts
- Decompose tens/ones and regroup
- Use partial sums and open number lines
- Check sums with estimation or inverse
Prerequisite skills
Add/subtract within 20; understand tens/ones; add a 2-digit and 1-digit number.
Teaching Strategies
Model regrouping with base-ten blocks; write partial sums before the standard form; annotate each regroup explicitly.
Assessment ideas
Give timed fact fluency checks appropriate to grade. Include word problems to assess application. Ask students to explain their thinking or show work in multiple ways. Have students estimate before calculating and compare. Use error analysis: show incorrect work and ask students to find and fix mistakes.
Common Challenges
Misaligning tens/ones; forgetting to add a regrouped ten; choosing the wrong operation in word problems.
Real-World Applications
Adding prices, distances, points, or totals across two events.
Extension Activities
Compare partial sums vs. standard algorithm; invent a two-step add word problem and solve it two ways.
Parent Tips
When adding receipts or scores, ask your child to estimate first, then compute and compare to the estimate.