Compose and Decompose Numbers 11-19 Activity
This compose and decompose numbers 11-19 activity has kindergarten and 1st grade children build teen numbers as ten and ones with ten-frames, counters and matching cards. Answer key included.
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About this resource
Description
Teen Numbers as Ten and Ones
This compose and decompose numbers 11-19 activity helps children see that every teen number is one ten and some more ones. Fourteen is 10 and 4, and seventeen is 10 and 7. When children build these numbers with counters in two ten-frames, they stop seeing teen numbers as random words and start to understand place value.
How to Use the Ten-Frame Mat and Cards
Print the 18 Number Cards, the double Ten-Frame Mat and the sheet of Monkey Counters. A child picks a number card, fills the top ten-frame with ten counters and puts the extra ones in the bottom frame. Then the child says the number as ten and some ones and finds the matching 10 + card. Use the compose and decompose numbers 11-19 activity in a math center, in a small group or with a partner. It is a hands-on kindergarten addition activity that also gives 1st grade students a quick review of tens and ones. A Kindergarten practice worksheet asks children to count dots in two ten-frames and fill in 10 + ones.
What’s Included
- Colorful cover page
- How to Use page with simple steps
- 9 number cards (11-19) and 9 matching 10 + ones cards
- Double Ten-Frame Mat
- Sheet of 42 cut-out Monkey Counters
- Kindergarten practice worksheet
- Answer keys for the card matches and the practice worksheet
Why This Activity Helps Kids
- Filling a full ten-frame first shows what one ten looks like.
- Matching each number to a 10 + card links the number to its parts.
- Moving counters by hand makes place value concrete for young learners.
Ideas for Teachers and Parents
Turn the cards face down for a memory game, ask children to build a number and then show one more, or let partners take turns building and checking each other’s mats.
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