facebook Composing & Decomposing Numbers Math Video | K, 1st & 2nd Grade
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Read About Composing & Decomposing Numbers

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WHAT IS COMPOSING & DECOMPOSING NUMBERS?

Composing means putting together. Decomposing means taking apart. You can decompose the numbers 11 – 19 into 10 and some more.

To better understand composing & decomposing…

WHAT IS COMPOSING & DECOMPOSING NUMBERS?. Composing means putting together. Decomposing means taking apart. You can decompose the numbers 11 – 19 into 10 and some more. To better understand composing & decomposing…

LET’S BREAK IT DOWN!

Decompose the number 13.

Decomposing means to take apart. You can decompose 13 into 10 and some more. 13 is 10 and 3 more.

Decompose the number 13. Decomposing means to take apart. You can decompose 13 into 10 and some more. 13 is 10 and 3 more.

Decompose the number 15.

There are 15 kittens in a pile. You can decompose 15 into 10 and some more. 15 is 10 and 5 more.

Decompose the number 15. There are 15 kittens in a pile. You can decompose 15 into 10 and some more. 15 is 10 and 5 more.

Use a ten frame to show 10 and some more.

You have 12 stickers. You put your stickers into ten frames. 10 stickers go into one ten frame. There are 2 stickers left. They go into another ten frame. 12 is 10 and some more.

Use a ten frame to show 10 and some more. You have 12 stickers. You put your stickers into ten frames. 10 stickers go into one ten frame. There are 2 stickers left. They go into another ten frame. 12 is 10 and some more.

Compose the number of bugs.

Composing means to put together. You have 10 bugs and 4 more bugs. You have 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14 bugs in all. 10 and 4 more is 14.

Compose the number of bugs. Composing means to put together. You have 10 bugs and 4 more bugs. You have 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14 bugs in all. 10 and 4 more is 14.

Compose the number of race cars.

You have 10 batteries and 9 more batteries. How many do you have in all? 10 batteries go in one 10 frame: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10. 9 go in a second ten frame: 11, 12, 13, 14, 15, 16, 17, 18, 19. 10 and 9 more is 19.

Compose the number of race cars. You have 10 batteries and 9 more batteries. How many do you have in all? 10 batteries go in one 10 frame: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10. 9 go in a second ten frame: 11, 12, 13, 14, 15, 16, 17, 18, 19. 10 and 9 more is 19.

COMPOSING & DECOMPOSING NUMBERS VOCABULARY

Break Apart
Split into parts. 17 can be broken apart into 10 and 7.
Join Together
Put together two or more parts. 6 and 10 can be put together to make 16.
Decompose
Break a number into parts. 13 can be decomposed into 10 and 3.
Ten Frame
A rectangle is divided into 10 equal parts that are used to represent numbers when counters or dots are placed in it.
Rectangle
A shape with 4 sides and 4 square corners.
Compose
Put a number together using its parts. 10 and 9 join together to compose the number 19.
A diagram that can show the composition and decomposition of numbers.
Says that two things are equal. 10 + 3 = 13.

COMPOSING & DECOMPOSING NUMBERS DISCUSSION QUESTIONS

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