# Third Grade Mental Math

Grade 3 / Math / Number Sense
CCSS: Math.3.NBT.A.2

Common Core State Standards

 Math Math 3 Grade 3 NBT Numbers & Operations in Base Ten A Use place value understanding and properties of operations to perform multi-digit arithmetic 2 Fluently add and subtract within 1000 using strategies and algorithms based on place value, properties of operations, and/or the relationship between addition and subtraction. Download Common Core State Standards (PDF 1.2 MB)
Lesson Objective
Use the strategies of decomposing, jumps of ten, and splitting
Length
6 min
Questions to Consider
How does mental math deepen students understanding of the basic operations?
What strategies does Ms. Saul use to encourage independent thinking before sharing responses?
Notice how students use a common vocabulary to describe strategies.
Support Materials Below
Common Core Standards
Math.3.NBT.A.2

## Supporting Materials

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#### Lesson Idea (Common Core)Third Grade Mental Math

Grade 3 / Math / Number Sense