2nd grade addition
2nd grade addition (class 2): a quiz for kids, then every skill in order with lessons, a checklist and a 4-week plan for parents.
🧒 Kids: answer 10 grade 2 addition questions. Tap Check ✓ after each one!
What 2nd grader learn about addition
In grade 2 (class 2), children become fluent with all the addition facts to 20. They use place value to add 2-digit numbers, with and without regrouping, and add up to four 2-digit numbers. They add within 1,000 using base-ten blocks and drawings, add 10 or 100 in their head, and solve one- and two-step word problems with bar models.
- 2.OA.A.1: solve one- and two-step word problems within 100.
- 2.OA.B.2: add fluently within 20 and know all sums of two 1-digit numbers from memory.
- 2.NBT.B.5: add fluently within 100 using place value and properties.
- 2.NBT.B.6: add up to four 2-digit numbers.
- 2.NBT.B.7: add within 1,000 using models and place value, regrouping when needed.
- 2.NBT.B.8: add 10 or 100 to a number from 100 to 900 in your head.
Other grades: Kindergarten · 1st grade · 2nd grade · 3rd grade · 4th grade
The big idea in grade 2
Grade 2 joins two things: fast facts and place value. 47 + 28 is really 4 tens + 2 tens and 7 ones + 8 ones. When the ones make 15, ten of them become 1 more ten.
Children should regroup with real objects (base-ten blocks or bundles of 10 sticks) before the written method. Then the small carried 1 means something: it is a whole ten that moved.
Fact fluency still matters. A child who counts on fingers inside every column loses track of the bigger sum. Keep a few minutes of daily fact practice.
2nd grade addition skills, in order
Work down the list. Each lesson explains the idea for parents with pictures and has a tool or quiz for your child.
| # | Skill (lesson) | Practice |
|---|---|---|
| 1 | Addition within 20 | Practice |
| 2 | Adding tens and hundreds | Tens number line |
| 3 | 2-digit addition | Practice |
| 4 | Partial sums | Partial sums tool |
| 5 | Regrouping | Column tool |
| 6 | Adding three or four numbers | Quiz on the page |
| 7 | 3-digit addition | Step-by-step tool |
| 8 | Word problems | Bar model tool |
| 9 | Speed check | Practice |
By the end of grade 2, your child should be able to…
- Know all facts within 20 from memory.
- Add 47 + 28 and explain the regroup.
- Add four numbers like 23 + 15 + 32 + 10.
- Add 10 or 100 in their head: 462 + 100.
- Add 3-digit numbers with blocks or drawings.
- Solve a two-step word problem with a bar model.
Unsure where your child is? The addition levels page has a short test for every step from counting to big numbers.
A 4-week plan for 2nd grade addition
| When | Focus |
|---|---|
| Week 1 | Facts to 20 and adding tens |
| Week 2 | 2-digit addition without regrouping, partial sums |
| Week 3 | Regrouping with blocks, then the written method |
| Week 4 | 3-digit addition with models and word problems |
Add 5 minutes of fact practice every day with the addition practice trainer, and a weekly addition speed test.
More for grade 2
All 2nd grade math · CBSE class 2 maths parent guide · Addition quiz for every grade · Addition for kids
What to say to your child
A short script for teaching it the first time. Pause after each line and let your child do the next step.
- “What is 34 + 25? Tens first.” (30 + 20 = 50, 4 + 5 = 9, so 59.)
- “Now 38 + 25. What happens with the ones?” (8 + 5 = 13, so carry a ten.)
- “Where does the carried 1 go?” (To the tens. It is 1 ten.)
- “What is 462 + 100?” (562.)
- “About how much is 38 + 25?” (40 + 25 = 65, so 63 makes sense.)
More worked examples
Example 1: no regrouping: 42 + 35
Tens: 40 + 30 = 70. Ones: 2 + 5 = 7. Answer 77.
Example 2: regrouping: 56 + 37
Ones: 6 + 7 = 13, write 3, carry 1. Tens: 5 + 3 + 1 = 9. Answer 93.
Example 3: four numbers: 25 + 13 + 15 + 20
25 + 15 = 40, 13 + 20 = 33, 40 + 33 = 73.
Practice questions (answers below)
Ask these out loud or write them down. Check each answer, and ask “how did you get that?” for one or two.
- 9 + 8
- 7 + 6
- 43 + 25
- 38 + 47
- 56 + 29
- 12 + 15 + 18 + 5
- 368 + 100
- 245 + 132
- A class has 26 girls and 28 boys. How many children?
- Raj had 35 stamps, got 18 more, then 10 more. How many now?
Show the answers
- 17
- 13
- 68
- 85
- 85
- 50
- 468
- 377
- 54 children
- 63 stamps
Common mistakes
How to teach it at home
Five minutes a day
Short daily practice beats long weekend sessions.
Talk it through
Ask “how did you work that out?” for one problem each day.
Use real life
Shopping, scores, pages read and steps walked are all addition.
By grade
- Before: 1st grade addition
- After: 3rd grade addition
Not sure where to start?
The free 2nd grade math check-up tests every grade 2 topic in 15–20 minutes. It shows which topics are solid and which lesson to start with.
Worksheets and practice
2-digit addition worksheet: printable PDF with an answer key.
Last reviewed
Questions parents ask
What addition should a 2nd grader know?
All facts within 20 from memory and 2-digit addition with regrouping. Also adding up to four 2-digit numbers, adding within 1,000 with models, and adding 10 or 100 mentally.
When do kids learn addition with regrouping?
Grade 2. Children regroup ones into tens within 100, then start regrouping within 1,000 with base-ten blocks.
Is there a 2nd grade addition quiz?
Yes. The quiz at the top of this page has 10 mixed grade 2 addition questions. Each one is marked straight away, with a hint for every mistake. Play again for a fresh set, or try the addition quiz for every grade.
What is class 2 addition?
Class 2 in India and grade 2 in the US cover the same addition skills. This page lists them in order, starting with addition within 20, adding tens and hundreds, 2-digit addition.
How much addition practice does a 2nd grader need?
About 10 minutes a day: 5 minutes of facts with the trainer and 5 minutes on the current skill. Short daily practice works better than long weekly sessions.