Compose and Decompose Teen Numbers

Kindergarten MathNumbers in Base Ten3 pages

About this worksheet

This kindergarten worksheet composes and decomposes teen numbers through ten-frames, drawing, and matching, all under Common Core K.NBT.1. Four pictures each show a completely filled ten-frame with extra dots beside it (3, 5, 2, then 7), and students finish equations such as 10 + 3 = 13. In the Draw and Complete section, a filled frame sits next to an empty one, and students draw the extra dots needed to make 14 and 16. Matching closes the sheet: the problems 10 + 1, 10 + 8, 10 + 4, and 10 + 9 connect by line to the teen numbers 11, 18, 14, and 19.

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$Compose and Decompose Teen Numbers: Numbers in Base Ten - page 1$

$Compose and Decompose Teen Numbers: Numbers in Base Ten - page 2$

$Compose and Decompose Teen Numbers: Numbers in Base Ten - page 3$

Curriculum objectives covered

K.NBT.1

“Compose and decompose numbers from 11 to 19 into ten ones and some further ones, e.g., by using objects or drawings, and record each composition or decomposition by a drawing or equation (e.g., 18 = 10 + 8); understand that these numbers are composed of ten ones and one, two, three, four, five, six, seven, eight, or nine ones.”

Questions 1 to 4 record compositions like 10 + 7 = 17 from drawings, the drawing tasks decompose 14 and 16 into ten and extra dots, and the matching section links 10-plus expressions to 11, 14, 18, and 19.

What's inside this worksheet

Count the frames (questions 1 to 4)

Each item pairs a full ten-frame of 10 dots with extra dots outside it: 3, 5, 2, and 7. Students fill both blanks of 10 + __ = __ from the picture.

Draw and Complete

Two problems supply a filled ten-frame beside an empty frame. Students draw 4 dots to make 14 and 6 dots to make 16, then finish each number sentence.

Match the Teen Numbers

Four addition expressions (10 + 1, 10 + 8, 10 + 4, 10 + 9) sit beside the shuffled numbers 18, 11, 19, and 14. Students draw a line from each expression to its total.

How teachers use it

Guided practice

Work question 1 together and insist nobody recounts the full frame; it is always 10. Students who count all 13 dots one by one are the ones this sheet is for.

Formative drawing task

Watch how students make 14. Drawing 4 dots straight into the empty frame shows the ten-and-some-more idea; drawing 14 dots shows it has not landed yet.

Fast finisher extension

After the matching section, ask students to write the two expressions that are missing from it, 10 + 4 aside: for example 10 + 2 and 10 + 6, with their totals.

More Kindergarten Math worksheets

Counting and Cardinality Addition and Subtraction Measurement and Data Geometry

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