# Friends of Ten

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Students will be able to use objects to decompose the number ten.

(10 minutes)
• Gather your students where they can see the interactive whiteboard.
• Load and watch the Number Pairs song.
• Invite your students to sing along as you play the song again.
• Ask your students to name some of the pairs in the song.
• Ask your students what sum all of the pairs added up to.
• Tell your students they will be playing a game to find the pairs that make ten.
• Tell your students that the pairs are the "friends of ten.”
(10 minutes)
• Write 5 + 5 = 10On the board.
• Then, write 10 = 5 + 5.
• Ask your students what they notice about the two maths sentences.
• Explain that when the ten is written first, it is called Decomposing. or breaking a big number into smaller numbers.
• Write 10 = 4 + ____On the board.
• Ask your students what number is missing.
• Ask your students to describe some ways to find the missing number.
• Tell your students that they will be using pennies to find the missing number.
• Load Decomposing Ten with PenniesOn the interactive whiteboard.
• Pause the video between transitions to explain, and have your students predict what will come next.
(15 minutes)
• Gather your students in a circle.
• Ask one student to help you demonstrate how to play the Friends of Ten game.
• Tell your students how to know if a coin lands on heads or tails.
• Pour ten coins from a small paper cup.
• Count the heads, and write the number.
• Count the tails, and write the number.
• Direct the next player to do the same.
• If a player pours a number pair that has already been used, explain that he will miss a turn.
• Continue in this way until all of the spaces are taken.
• Count who wrote the most number pairs.
• Ask your students if they have questions about the game.
• Put your students into pairs.
• Have the pairs of students take their pennies, markers, and game sheets to another spot in the room to play.
• Observe your students as they play.
• Offer support where needed.
(5 minutes)
• Hand out the Pairs that Make 10 worksheet, and dismiss your students to work in their table spots.
• Observe and support your students as they work.
• Enrichment:Give students 11 pennies to find pairs of numbers that make 11.
• Support:Display pairs that make 10 where your students can see and check their work.
(5 minutes)
• Make sure your students can draw a line from the left side to the corresponding number.
• Walk around the room and check to see that your students are writing the correct numbers.
(5 minutes)
• Replay the song from the introduction.
• Encourage your students to sing along.
• Ask your students to name some number pairs that make ten.
• Ask your students to describe what decomposing means.

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