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# Mental Math for Addition and Subtraction Equations

## Solve simple addition/subtraction equations mentally.

Levels are CK-12's student achievement levels.
Basic Students matched to this level have a partial mastery of prerequisite knowledge and skills fundamental for proficient work.
At Grade (Proficient) Students matched to this level have demonstrated competency over challenging subject matter, including subject matter knowledge, application of such knowledge to real-world situations, and analytical skills appropriate to subject matter.
Advanced Students matched to this level are ready for material that requires superior performance and mastery.

## Mental Math for Addition and Subtraction Equations

by CK-12 //at grade

Solve single variable addition and subtraction equations by using mental math

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## Mental Math for Addition and Subtraction Equations

by CK12 Math //at grade

Solve single variable addition and subtraction equations by using mental math

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## Mental Math for Addition and Subtraction Equations

by CK-12 //at grade

Find out how to use mental math to solve single variable addition and subtraction equations.

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• PLIX

## Mental Math for Addition and Subtraction Equations: Marble Bag Collector

by CK-12 //at grade

Mental Math for Addition and Subtraction Equations Interactive

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• Practice
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## Mental Math for Addition and Subtraction Equations Practice

by CK-12 //at grade
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