Addition and subtraction

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.

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

Students learn how to partition numbers.

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

Develop and analyze strategies for adding and subtracting numbers.

Estimate sums and differences.

Teach students the meaning of adding and subtracting.

Add and subtract decimals to solve problems. Solve problems involving money.

Practice twin numbers up to 20.

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

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

A clear and simple bead necklace.

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

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

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

Identifying and placing numbers and/or decimals.