Eureka Math² Kindergarten, Module 5: Numbers 10–20 and Counting to 100
In this unit, your child works with the numbers from 10 to 20 and counts on toward 100. Kindergartners build teen numbers as one ten and extra ones, count out larger groups carefully, start counting from a number other than 1, and count by tens. Breaking numbers apart in the last unit makes 'ten and some more' feel natural, and the year ends with shapes.
By Robert “Bobby” BarnettMath teacher, parent, and founder of Bobby’s Math Club
What is my child learning in Module 5?
- Counting by ones and by tens to 100, keeping the order of the tens straight from 10 all the way up. Learn more about counting to 100 by ones: Counting to 100 by ones · Learn more about counting to 100 by tens
- Starting a count from any number up to 100, such as 23, and continuing it without going back to 1. Learn more: Counting on from any number
- Knowing the last number said tells how many even in groups of 11 to 20, without recounting to check. Learn more: How counting tells you how many
- Counting up to 20 objects in lines or rows, and counting out a teen number, such as 18, when asked. Learn more: Counting groups of up to 20 things
- Composing and decomposing teen numbers as one ten and some ones, such as 18 = 10 + 8 and 10 + 8 = 18. Learn more: Teen numbers as ten and some more
Sample questions to try together
These are real questions from our practice. Tap the speaker to hear one read aloud, or the light bulb for a hint, and talk about the answer together.
Question 1 of 3
What comes next? 10, 20, 30, 40, __
- 60
- 50
- 41
How you can help
- Ask your child to count out 18 spoons or socks, making a group of 10 first, then saying the total as ten and eight.
- Start counting at any number during a walk or ride, such as 23, and take turns saying the next number until you reach 40.
- Count to 100 by tens with a jump on each number, then count by ones from 90 to 100 so your child hears how the tens fit.
Where kids can get stuck
- Writing 13 = 10 + 3 but not 10 + 3 = 13, or not linking the equation to the objects.
- Counting out 17 blocks when asked, then adding more because they are not watching for when to stop.
- Saying 'twenty-nine, twenty-ten' instead of thirty at the end of a group of ten.
Practice makes perfect
Bobby's Math Club has practice problems that adapt to your child’s level, each with a detailed explanation and an easy-to-follow video, so your child can build confidence in these skills one step at a time.
Words your child will hear
- teen numbers
- The numbers 11 to 19, each made of ten and some more ones.
- ten ones
- Ten single things, which together make one ten.
- ones
- Single things counted one at a time.
- count on
- To start counting from a number other than 1, like 23, 24, 25.
- count by tens
- Saying 10, 20, 30, and so on, up to 100.
- equation
- A math sentence with an equal sign, like 3 + 2 = 5.
- hundred
- The number 100, which is the same as ten tens.
Want to help your child master numbers to 20 and beyond?
In Bobby's Math Club, your child practices these skills at just the right level, with a hint when they need one, a clear explanation after every question, and kid-friendly videos. Unlimited practice is free.
Join the club
Written by Robert “Bobby” Barnett
Bobby is an award-winning math teacher, the author of Meet Every Learner’s Needs, and the father of two elementary-school math learners. He uses Bobby’s Math Club with his own kids a few times every week. Learn more or contact Bobby.
Which math standards does Eureka Math² Kindergarten Module 5 cover?
Eureka Math² Kindergarten Module 5 covers these math standards. Each one links to what it means, sample questions, and teaching strategies.
For teachers: Unit names and order vary between editions and districts, so your school’s own materials have the exact sequence. Learn how Bobby's Math Club can help your students grow.