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- Lesson plan -

Solve addition and subtraction problems, including word problems involving two-and-three digit numbers. Complete in addition and subtraction sentence with missing addends including inverse relationships between and addition and subtraction.

### One more or one less

- Activity -

Look at the items. Add one (or subtract one) and write down that number. ### Number Bonds

- Activity -

Students learn how to partition numbers.

### Place Value Chart: With Decimal Numbers

- Activity -

Formatting numbers for decimals. Students will learn to understand the place value of every number. - Lesson plan -

Develop and analyze strategies for adding and subtracting numbers.

### Estimation

- Lesson plan -

Estimate sums and differences. ### Bus Sum - phase 1

- Activity -

Teach students the meaning of adding and subtracting.

- Lesson plan -

Add and subtract decimals to solve problems. Solve problems involving money. ### Twin Numbers - Introduction

- Lesson plan -

Practice twin numbers up to 20.

- Lesson plan -

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

Develop fluency with addition and subtraction of non-negative rational numbers with unlike denominators.

- Activity -

A clear and simple bead necklace. ### Adding & Subtraction Fractions with Unlike Denominators

- Lesson plan -

Use fraction models to add and subtract fractions with unlike denominators, and progressing to solve addition and subtraction problems without modeling.

### Doubling and Halving

- Lesson plan -

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