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Assessment
Illustrative Mathematics

Three Composing/Decomposing Problems

For Students 2nd Standards
Practice composing and decomposing numbers in base-ten using three word problems. Each problem presents a different scenario requiring learners to explain their thinking, find the number of ones, and find out different ways to make a...
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Lesson Plan
Illustrative Mathematics

Pick Two

For Teachers Pre-K - 1st Standards
Learning to break apart numbers into smaller pairs is a critical step young mathematicians take as they develop their number sense. To practice this skill, children are provided with sets of three numbers and are asked to pick the two...
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Lesson Plan
Illustrative Mathematics

Shake and Spill

For Teachers Pre-K - 1st Standards
Entertaining as well as educational, this math activity about decomposing numbers is bound to capture the engagement of young learners. Given a cup and five two-color counters, young mathematicians simply shake and spill the cup,...
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Worksheet
Curated OER

Decomposing Numbers Step-By-Step

For Students 1st - 2nd
Here are two addition-related exercises. However, bear in mind, the explanations are featured below each of them. Use this as an all-class warm up, revealing the explanations if and when you see fit. First, examine the four sets of...
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Worksheet
Noyce Foundation

Apple Farm Field Trip

For Students 1st - 3rd Standards
Monitor the growth of young mathematicians with a comprehensive addition and subtraction assessment. Using the context of a class field trip to an apple orchard, this series of four story problems allows children to demonstrate their...
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Lesson Plan
Curated OER

Place Value & Picasso

For Teachers 3rd - 5th Standards
Place value to the millions is the focus of this math lesson plan. Third and fourth graders investigate multiple ways to represent a number. They examine place value while studying factual information about Pablo Picasso. Resources are...
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Lesson Plan
Curated OER

Playing the Cards of Place Value

For Teachers 3rd - 4th
Third graders explore place value to the ten-thousands place. In this amazing, 21-page place value lesson, learners represent numbers in standard and expanded form, and use technology to represent numbers to 9,999.
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Lesson Plan
Utah Education Network (UEN)

Geo Shapes

For Teachers Pre-K - 2nd Standards
Invite your first graders to compose and decompose two and three-dimensional figures with this fun, hands-on instructional activity. They investigate and predict the results of putting together and taking apart two-dimensional shapes...
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Lesson Plan
Illustrative Mathematics

What’s Missing?

For Teachers Pre-K - 1st Standards
Now you see them, now you don't! This fun peek-a-boo activity engages young mathematicians in developing their ability to compose and decompose numbers. After being presented with a series of counters, children close their eyes while the...
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PPT
Curated OER

Addition and Subtraction up to 100

For Teachers 4th - 5th
After reviewing double-digit addition and subtraction up to and from 100, learners are introduced to addition and subtraction up to and from 10,000. A grid is used along side number decomposition to help them solve a word problem...
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Worksheet
Math Worksheets Land

Decomposing Numbers Guided Lesson

For Students K Standards
Guide your young mathematicians through an exercise in composing and decomposing numbers from 0 to 10. The prompts ask learners to match an addition sentence to the model, to select which of the equations makes 9, and which one makes 6....
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Lesson Plan
Ohio Department of Education

Describing and Creating Plane Figures - Grade One

For Teachers K - 2nd Standards
Young mathematicians draw, create, and describe different shapes using triangles. They discuss attributes of the original and created shapes. Pupils classify the created shapes and draw and write in mathematics journals to communicate...
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Lesson Plan
Curated OER

M & M Addition

For Teachers K - 1st
Eat your math manipulatives, are you serious? Yup, Learners listen to the story The M & M's Addition book, add single digit numbers to reach sums up to six, and demonstrate addition and subtraction number combinations using several...
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Lesson Plan
Curated OER

Let's Count to 20

For Teachers Pre-K - 2nd
Budding mathematicians create groups of 10 to 20 objects using numerals to record the size of a group. They construct sets of numbers up to 10, write the numerals up to 10, and count up to 10 rationally. Learners also use ten frames and...
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Lesson Plan
K20 LEARN

Building Numbers: Addition And Subtraction Up To 10

For Teachers 1st Standards
Animals on Board! Stuart J. Murphy introduces scholars to composed numbers in preparation for writing and drawing true or false number sentences. A game of Bear in the Cave challenges pupils to locate a missing addend. Sorting number...
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Lesson Plan
Illustrative Mathematics

Overlapping Rectangle

For Teachers K - 3rd Standards
Challenge young mathematicians' ability to compose and decompose shapes with this fun geometry puzzle. The goal is simple, locate all of the rectangles shown in a picture of three overlapping rectangles. Perform this activity as a whole...
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Lesson Plan
Illustrative Mathematics

Make Your Own Puzzle

For Teachers K - 2nd Standards
Puzzling over what geometry lesson to teach next? Look no further. This simple activity teaches young mathematicians how shapes can be decomposed into smaller figures, and how smaller figures can be assembled into larger shapes. To learn...
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Worksheet
Fuel the Brain

Solve Problems Using Strategies Such as Modeling and Composing/Decomposing Quantities

For Students 2nd - 3rd
Hopefully your students know that motorcycles have two wheels and cars have four. By using this knowledge, they will be able to solve the first tricky story problem in this worksheet. Using methods of modeling and composing and...
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Lesson Plan
Curated OER

Anchoring Numbers to Five and Ten

For Teachers 1st - 2nd
Students complete activities to relate numbers to each other. For this number connection lesson, students count number sets, count forward and backward, and complete other number recognition activities to learn how numbers are related.
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Activity
Curated OER

Finding the Area of Polygons

For Teachers 3rd Standards
Third graders are exposed to finding the area of polygons by decomposing figures and recomposing them into rectangles. This strategy allows children to expand on their prior knowledge of constructing shapes by rearranging parts into...
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Lesson Plan
Curated OER

Building Sets of 13 and 14

For Teachers Pre-K - 1st
Compose and decompose sets of 13 and 14 and compare sets of each with your little learners. They use objects to construct sets of 13 and 14, record their answers, and compare sets in several different ways.
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Lesson Plan
Curated OER

Students' Strides

For Teachers 5th
Complete problems using base ten blocks to see the difference in the place value of a decimal and how it affects a number's value. Learners compare decimal values as well. Ample time for discussion and modeling are allowed in the...
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Lesson Plan
Curated OER

Adding and Subtracting

For Teachers K - 1st
Students will add and subtract numbers less than 100 as well as understand and use the inverse relationship between addition and subtraction. They compose/decompose numbers up to 10 and understand a variety of situations in which...
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Interactive
New Mexico State University

Gate

For Students 4th - 6th Standards
Build numbers with place value to save the day. Pupils use the keyboard to control the digits in the hundredths through hundreds place to create target numbers to destroy shadows. As participants build the numbers, a number line shows...

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