Teen Numbers: 10 and Some More

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Grade KMathPlace Value & RoundingCCSS K.NBT.A.1

Skill: Composing and decomposing the numbers 11 to 19 as ten and some ones

Preview of the Teen Numbers: 10 and Some More printable worksheet
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10 versions, each with its own answer key

Same skill and layout, a fresh set of problems in every version, so children can keep practicing without repeating a page. Problems are not repeated between versions unless a skill has only a small number of possible problems (for example, the addition facts within 10).

Download all 10 versions (one PDF)All 10 answer keys (PDF)

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About this worksheet

Teen numbers can be confusing. We say "fourteen," with the four first, but we write a 1 first, and the 1 stands for a whole group of ten. This kindergarten worksheet helps children see that every number from 11 to 19 is made of one ten and some more ones.

The sheet has eighteen short equations in three kinds, six of each, mixed together. Some ask children to put ten and some ones together, such as 10 + 6 = ___. Some ask them to take a teen number apart, such as 16 = 10 + ___. Others use place value words, such as 1 ten and 6 ones = ___. Seeing one idea three ways builds real understanding. The ten versions use every combination before any repeats.

How to use it: build a few teen numbers first with real objects. Make a group of ten counters or cubes, then add a few more, and count them all together. Ask, "How many are in the ten? How many extra?" A ten-frame works well, too: fill one frame, then put the extra counters in a second frame. Read each equation aloud for children who are still learning to read the words.

The answer key shows every equation with the missing number filled in. This worksheet supports Common Core standard K.NBT.A.1 (compose and decompose numbers from 11 to 19 into ten ones and some further ones, and record each one with an equation such as 18 = 10 + 8). Warm up with our Count to 20 With Ten-Frames worksheet, and try our Place Value: Tens and Ones worksheet in first grade.