Mathematics·Addition & Subtraction·procedural
Adding numbers
Add up to four two-digit numbers using strategies based on place value and properties of operations
Suggested ages 7–8
Learning journey
Your child is advancing their calculation skills — learning to add and subtract larger numbers up to 1000, mastering mental math strategies, and solving more complex word problems.
Evidence of understanding
- Add three or four two-digit numbers by grouping tens and ones
- Look for pairs that make multiples of 10 to simplify addition
- Explain the strategy used to combine multiple addends
Assessment prompt
Can Adding numbers add up four two-digit numbers — like '14 + 23 + 32 + 19' — by grouping them cleverly, rather than just plodding through from left to right?
Standards alignment
2.NBT.6US · ccss-math
Add up to four two-digit numbers
Common Core State Standards for Mathematics · 2