CCSS.Math.Content.4.NBT.B.4
The standard
Fluently add and subtract multi-digit whole numbers using the standard algorithm.
Common Core State Standards for Mathematics · Number and Operations in Base Ten
What this standard means
Students need to add and subtract whole numbers with several digits using the standard algorithm. They must line up place values, regroup when needed, and keep track of each step without relying on drawings or expanded form every time.
Mastery looks like accurate, efficient work with numbers up to at least the thousands, including problems with zeros and multiple regrouping steps. Students often get stuck lining up digits, subtracting across zeros, or regrouping without understanding what changed.
Ways to teach it
- Use base-ten blocks to model 4,203 minus 1,678, then have students record each move with the standard algorithm beside it.
- Ask students to explain in writing why digits must be lined up by place value before adding or subtracting.
- Give four mixed addition and subtraction problems, including one with zeros, and check for correct regrouping and alignment.
- Have students add and subtract prices from a pretend class supply order, then verify totals with a partner.
Plan a lesson for CCSS.Math.Content.4.NBT.B.4
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Related standards
- CCSS.Math.Content.6.NS.B.3
Fluently add, subtract, multiply, and divide multi-digit decimals using the standard algorithm for each operation.
- CCSS.Math.Content.6.NS.B.2
Fluently divide multi-digit numbers using the standard algorithm.
- CCSS.Math.Content.3.NBT.A.2
Fluently add and subtract within 1000 using strategies and algorithms based on place value, properties of operations, and/or the relationship between addition a...
- CCSS.Math.Content.5.NBT.B.5
Fluently multiply multi-digit whole numbers using the standard algorithm.