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Addition and subtraction

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Numerical Expressions

- Activity -

Students learn how written phrases are interpreted as numeric expressions.

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Add & Subtract Whole Numbers

- Lesson plan -

Develop and analyze strategies for adding and subtracting numbers.

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Addition & Subtraction

- Lesson plan -

Develop and analyze strategies for adding and subtracting numbers.

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Judging Reasonable Answers

- Lesson plan -

Students will estimate to judge if answers are reasonable in addition, subtraction, division, and multiplication problems.

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Doubling and Halving

- Lesson plan -

Students use addition, subtraction, doubling and halving to solve story problems.

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Adding & Subtracting Decimals

- Lesson plan -

Add and subtract decimals, with instruction and practice targeted at correctly organizing numbers to avoid typical computational errors.

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Generate Equivalent Expressions

- Activity -

Apply the properties of operations to generate equivalent expressions by completing the missing information.

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