Mathematics·Addition & Subtraction·procedural
Fluent adding and subtracting within 100
Fluently add and subtract within 100 using strategies based on place value, properties of operations, and the relationship between addition and subtraction
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 two-digit numbers within 100 efficiently (e.g. 46 + 37 using place-value partitioning)
- Subtract two-digit numbers within 100 fluently (e.g. 83 − 25)
- Choose between strategies (decomposing, compensating, using known facts) based on the numbers involved
Assessment prompt
Can Fluent adding and subtracting within 100 reliably add or subtract two-digit numbers like '68 + 27' or '91 − 45', choosing the best strategy for each problem?
Standards alignment
2.NBT.5US · ccss-math
Fluently add and subtract within 100
Common Core State Standards for Mathematics · 2