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# Addition and subtraction

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### Addition & Subtraction

- Lesson plan -

Develop and analyze strategies for adding and subtracting numbers.

### Judging Reasonable Answers

- Lesson plan -

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

### Add & Subtract Whole Numbers

- Lesson plan -

Develop and analyze strategies for adding and subtracting numbers.

### Adding & Subtracting Rational Numbers

- Lesson plan -

Add and subtract rational numbers including negative fractions. Use absolute value to solve addition and subtraction problems.

### Estimation

- Lesson plan -

Estimate sums and differences.

### Adding & Subtracting Integers

- Lesson plan -

Add and subtract integers in real-life situations including temperature, bank account balances and sea level.

### Doubling and Halving

- Lesson plan -

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