K.6 Numbers 0–20
Unit Goals
 Students answer “how many” questions and count out groups within 20. They understand that numbers 11 to 19 are composed of ten ones and one, two, three, four, five, six, seven, eight, or nine ones. They write numbers within 20.
Section A Goals
 Count groups of up to 20 objects.
Section B Goals
 Understand numbers 1119 as 10 ones and some more ones.
Section C Goals
 Count groups of images up to 20.
 Represent quantities up to 20 with a written number.
Section A: Count Groups of 1120 Objects
Problem 1
Exploration
How many shapes do you see on the soccer ball?
Solution
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Problem 2
Exploration
How many soccer players are there in the picture?
How did you count them?
Solution
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Section B: 10 Ones and Some More
Problem 1
Solution
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Problem 2
How many fingers are there?
Show how many fingers there are using a 10frame.
Solution
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Problem 3
Write a number to show how many dots there are.
_______________
_______________
Solution
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Problem 4
Draw more dots to show each number.

11

19

15
Solution
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Problem 5
Choose an expression that matches the dots.
\(10 + 5\)
\(10 +2\)
\(10 +7\)
Explain how the expression matches the dots.
Solution
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Problem 6
Fill in the blanks to make each equation true.

\(10 + 7 = \underline{\hspace{1.4 cm}}\)

\(\underline{\hspace{1.4 cm}} + \underline{\hspace{1.4 cm}} = 18\)

\(\underline{\hspace{1.4 cm}} + \underline{\hspace{1.4 cm}} = 15\)
Solution
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Problem 7
Exploration
What are some different ways you know how to show 16?
What is your favorite way to show 16?
Share with a partner.
Solution
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Problem 8
Exploration

Arrange 18 dots in a way that helps you see there are 18.

Arrange 18 dots in a way that makes it hard to see how many there are.

Explain why you chose your arrangements.
Try again with other numbers up to 19.
Solution
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Section C: Count Groups of 11–20 Images
Problem 1

How many triangles are there?
There are _______________ triangles.

Lin wrote the equation \(10 + 2 = 12\) to show the number of hexagons.
Color the hexagons to show Lin's equation.
Solution
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Problem 2

How many squares are there?
There are _______________ squares.

How many circles are there?
There are _______________ circles.
Solution
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Problem 3
Exploration
Pick some of the flowers in the picture.

How many are there?

Share your answer with a partner.
Can you guess which flowers your partner counted?
Solution
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Problem 4
Exploration
Pick a shape in one of the designs and figure out how many there are.
Solution
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