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Showing Results for composing decomposing

Use this lesson to introduce composing and decomposing as part of your students’ addition and subtraction toolkits.

Composing and Decomposing

Use this scaffolded EL support lesson to help students learn the strategy of decomposing three-digit numbers to add their place values. This lesson can be used alone or prior to teaching Composing and Decomposing to students.

Decomposing and Adding Place Values

Give your students practice decomposing mixed numbers into number bonds.

Practice Decomposing Mixed Numbers

Use these this glossary with the EL Support Lesson: Composing Shapes.

Glossary: Composing Shapes

Use these vocabulary cards with the EL Support Lesson: Composing Shapes.

Vocabulary Cards: Composing Shapes

Give your young mathematicians practice with number bonds and number sentences in this visually interesting worksheet that has students composing and decomposing numbers.

Compose and Decompose Within 20

Give your students simple two-digit numbers to practice the decomposition addition strategy! This can be used as a stand-alone activity or in conjunction with the Composing and Decomposing lesson plan.

Decompose to Add: Two Digits Within 20

The decomposing and composing subtraction strategy can be a handy tool for tough three-digit numbers. Use this worksheet to give your students the practice they need to nail down the concept.

Subtraction with Decomposition

Why make things harder on ourselves? Teach your students to decompose numbers to make math easier! Use this as a stand alone lesson or a pre-lesson for *Decompose to Multiply: 6, 7, 8, and 9.*

Decomposing Numbers

Roll some dice to introduce the early concepts of associative and commutative properties in addition by composing and decomposing 10. Worksheets and a quiz are included!

Give Me 10!

You know about 2D shapes, now get ready to learn your 3D shapes in this colorful worksheet!

Composing 3D Shapes: Matching

Dissect three-dimensional shapes in this colorful first- and second-grade geometry worksheet!

Composing 3D Shapes: Which Faces?

Discover how structures are built out of individual 3D shapes in this inviting geometry worksheet!

Composing 3D Shapes: Build It

Build with blocks in this colorful worksheet on three-dimensional shapes!

Composing 3D Shapes: What's Missing? 

Practice decomposing numbers in this second-grade subtraction worksheet!

Decompose to Subtract From Three-Digit Numbers

Get more practice decomposing numbers and writing equations with this inviting math worksheet!

Decompose 11-19: Tens and Ones #3

Decompose 11-19: Tens and Ones #5

Decompose 11-19: Tens and Ones #2

Decompose 11-19: Tens and Ones #4

Decompose 11-19: Tens and Ones #6

Practice decomposing numbers and writing equations with this kindergarten and first-grade math worksheet!

Decompose 11-19: Tens and Ones #1

First graders gain confidence with addition and decomposing numbers in this fun water rafting game! 

Water Rafting: Compose Numbers to Make 10 (Game 2)

Build structures with shapes to practice geometry in this colorful worksheet!

Composing 3D Shapes: Which One Am I?

Use the mat to give students extra practice composing a 10 as they learn to add to 20.

Double Ten Frame Mat

Give your young math learner practice composing numbers 11&ndash;19 with this addition strategies worksheet!

Compose 11-19: Ten and Ones #1

The second in a series of six, this addition worksheet gives learners more practice composing numbers 11&ndash;19!

Compose 11-19: Ten and Ones #2

The third in a series of six, this addition worksheet gives learners more practice composing numbers 11&ndash;19!

Compose 11-19: Ten and Ones #3

The fourth in a series of six, this addition worksheet gives learners more practice composing numbers 11&ndash;19!

Compose 11-19: Ten and Ones #4

The fifth in a series of six, this addition worksheet gives learners more practice composing numbers 11&ndash;19!

Compose 11-19: Ten and Ones #5

The last in a series of six, this addition worksheet gives learners more practice composing numbers 11&ndash;19!

Compose 11-19: Ten and Ones #6

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