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 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.

### 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.

## COMPOSING & DECOMPOSING NUMBERS VOCABULARY

## COMPOSING & DECOMPOSING NUMBERS DISCUSSION QUESTIONS

### Show 10 and 4 with counters in ten frames. Show the same number in a number bond.

### Show 10 and 7 with counters in ten frames. Show in an equation.

### Show a group of 18 counters. Don’t tell students how many are in the group. Have students show the number as 10 and some more in two ten frames, and in a number bond.

### Show a group of 12 counters. Don’t tell students how many are in the group. Have students show the number as 10 and some more in two ten frames, and in an equation.

## Choose Your Free Trial Period

## Get 90 Days Free

### By inviting 4 other teachers to try it too.

Skip, I will use a 7 days free trial

## Thank You!

Enjoy your free 90 days trial