Number Sense and Additive Reasoning
Grade 3 Mathematics • MA.3.NSAR
1 Level 1 Foundation
6 skillsPlace value names up to ten thousands
Value of a digit up to ten thousands
Convert between standard and expanded form
Compare and order numbers using number lines
Add two numbers up to three digits: without regrouping
Subtract numbers up to three digits: without regrouping
2 Level 2 Developing
8 skillsConvert to/from a number
Convert between place values
Compare numbers
Order numbers
Round to the nearest ten or hundred using a number line
Round to the nearest ten or hundred
Add two numbers up to three digits: with regrouping
Subtract three-digit numbers: with regrouping
3 Level 3 Proficient
8 skillsPlace value word problems
Estimate sums by rounding: up to 1,000
Estimate differences by rounding: up to 1,000
Add two numbers up to three digits
Add two numbers up to three digits: word problems
Subtract numbers up to three digits
Subtract numbers up to three digits: word problems
Addition and subtraction word problems: up to three digits
4 Level 4 Advanced
6 skillsEstimate sums and differences by rounding: up to 1,000
Estimate sums and differences: word problems
Add three numbers up to three digits each
Add two numbers up to four digits
Subtract two numbers up to four digits
Find two numbers based on sum and difference
5 Level 5 Expert
5 skillsAdd two numbers up to four digits: word problems
Add two numbers up to five digits
Subtract two numbers up to four digits: word problems
Subtract two numbers up to five digits
Two-step addition and subtraction word problems
About Number Sense and Additive Reasoning
This Grade 3 Mathematics standard focuses on building student proficiency in number sense and additive reasoning. As part of the Florida B.E.S.T. curriculum, this standard is assessed on the FAST (Florida Assessment of Student Thinking) exam.
Why This Standard Matters
This is a high-priority standard that forms the foundation for future mathematical concepts. Students who master these skills are better prepared for more advanced topics in later grades.
How to Use These Resources
- Level 1-2: Start here for students who need foundational practice or intervention
- Level 3: Core grade-level skills that all students should master
- Level 4-5: Challenge and enrichment for students ready to advance
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