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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

Students will love composing and decomposing two-dimensional shapes using tangram puzzle pieces. Use this plan alone or to frontload key vocabulary and concepts taught in the lesson plan **Know Your Shapes.**

Composing Shapes

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!

Students will get plenty of practice composing tens with ten frames to add to 20! Use this scaffolded EL Lesson alone or for more addition practice before teaching the **Scavenger Hunt Addition** lesson.

Build It on a Ten Frame

Students will love composing shapes using tangrams in this hands-on lesson! Use this plan alone or as a support lesson plan for the **Tangrams: An Ancient Chinese Puzzle** lesson plan.

All About Tangram Puzzles

It’s magic! In this lesson, students will “magically” move shapes together to form new shapes. Clay and toothpicks equal hands-on fun! Tangram challenges are provided for those students who need that little extra challenge.

Magical Movement

Help your students subtract with confidence by sharing two different strategies. Use this lesson to build on students’ understanding of subtraction and to evaluate this key skill.

Subtraction with Regrouping

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