Friends of Ten
Students will be able to use objects to decompose the number ten.
- 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.”
Explicit Instruction/Teacher modeling(10 minutes)
- Write 5 + 5 = 10 on the board.
- Then, write 10 = 5 + 5.
- Ask your students what they notice about the two math 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 Pennies on the interactive whiteboard.
- Pause the video between transitions to explain, and have your students predict what will come next.
Guided Practice(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.
Independent working time(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.
- 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.
Review and closing(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.