NY Next Generation Math NY-3.NBT.2
The Standard
Fluently add and subtract within 1,000 using strategies and algorithms based on place value, properties of operations, and/or the relationship between addition and subtraction.
New York State Next Generation Mathematics Learning Standards
Teacher's field guide
What This Standard Means
What Students Need to Do
- Students add and subtract whole numbers within 1,000 accurately and efficiently. They choose strategies or algorithms grounded in place value, operation properties, or the relationship between addition and subtraction.
What Mastery Looks Like
- A student solves 684 minus 297 as 387 using a reliable written method. The student explains each regrouping with hundreds, tens, and ones and checks the result with addition.
Common Misconceptions
- Students may regroup without preserving place values or subtract the smaller digit from the larger digit in each column. They may apply a memorized procedure without checking whether the answer is reasonable.
How to Assess It
- Ask students to solve 468 + 357 and 702 minus 286, then explain one step using place-value language.
Lesson moves
Ways to Teach It
Model an addition and subtraction problem with base-ten blocks, then connect every trade to a written step.
Ask students to compare two correct methods and explain where the same place-value reasoning appears.
Play error analysis with worked examples containing one regrouping or place-value mistake to locate and repair.
Find changes in school attendance or library totals using numbers within 1,000.
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Printable NY-3.NBT.2 Worksheet
A ready-to-print activity worksheet aligned to NY-3.NBT.2, with an answer key for the teacher on its own page. No account needed.
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Related Standards
- NY-2.NBT.7.a
Add and subtract within 1000, using concrete models or drawings, and strategies based on place value, properties of operations, and/or the relationship between ...
- NY-2.NBT.5
Fluently add and subtract within 100 using strategies based on place value, properties of operations, and/or the relationship between addition and subtraction.
- NY-2.OA.2.a
Fluently add and subtract within 20 using mental strategies. Strategies could include: counting on, making ten, decomposing a number leading to a ten, using the...
- NY-4.NBT.4
Fluently add and subtract multi-digit whole numbers using a standard algorithm.
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