Help children decompose 2-digit numbers by identifying the place value of the tens and ones with this matching activity.
Decomposing Numbers Two Digit Card Game
This set of cards has been created to help students understand decomposing two-digit numbers and the importance of grouping in tens. Students need to decompose a range of two-digit numbers by connecting them with their corresponding tens and ones cards. For example, the number 62 will be decomposed into 60 and 2.
This teaching resource download includes the following cards:
- 12 two-digit number cards.
- 12 corresponding one-digit number cards
- 12 corresponding two-digit number cards
- 12 addition symbol cards
- 12 equal symbol cards
The idea is that students will need to choose a two-digit number (purple cards), pop down the equals symbol, find the matching tens number (orange card), and matching ones card (green card), with the addition symbol between the last two cards. The addition and equals sign symbolizes how the two-digit number can be broken down into tens and ones to create an addition sum.
Decomposing by Place Value Aids Number Sense
Teaching students to decompose reinforces the concept of place value, showing the importance of each digit in a number. Using card games like this to allow students to practice decomposing by place value allows them to develop a deeper sense of how numbers can be manipulated and combined.
Download and Decompose Today!
Print, cut, and laminate a class set of the cards and store them in a zip-lock bag. Use the dropdown menu to choose between the editable Google Slides version and the easy-to-print PDF version.
Kendall Britnell, a teacher and Teach Starter Collaborator, contributed to this resource.
More Decomposing Activities
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Decomposing 3-Digit Numbers Matching Activity
Help children decompose 3-digit numbers by identifying the place value of hundreds, tens, and ones with this matching activity.
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Build It! Decomposing Numbers – Task Cards
Practice decomposing numbers with this activity that has students splitting numbers into parts.
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Composing and Decomposing Numbers - Instructional Slide Deck
Introduce composing and decomposing numbers to your students with this instructional slide deck.
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