Addition & Subtraction Number String: First Grade

Grade 1 / Math / Tch DIY
CCSS: Math.1.OA.D.8

Common Core State Standards

Math

Math

1

Grade 1

OA

Operations & Algebraic Thinking

D

Work with addition and subtraction equations

8

Determine the unknown whole number in an addition or subtraction equation relating three whole numbers. For example, determine the unknown number that makes the equation true in each of the equations 8 + ? = 11, 5 = _ - 3, 6 + 6 = _.

Download Common Core State Standards (PDF 1.2 MB)



The number string routine encourages students to use what they know about the meaning of the equal sign and operations to find the missing piece of an equation.

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Common Core Standards
Math.1.OA.D.8

Supporting Materials

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  • Lesson Plan: Number String Planning Guide.PDF

  • Student Work: Journal Samples.PDF

  • Reflection and Resources.PDF

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