Zearn Math Kindergarten, Mission 5: Numbers 10-20 and Counting to 100
In this unit, your child sees the numbers 11 to 20 as ten ones and some more ones, counts to 100 by ones and by tens, and starts counting from any number instead of 1. It builds on the number pairs and addition to 10 from the last unit, then gives way to comparing and building shapes at the end of the year.
By Robert “Bobby” BarnettMath teacher, parent, and founder of Bobby’s Math Club
What is my child learning in Mission 5?
- Counting to 100 by ones and by tens, with special care at the switch from one ten to the next. Learn more about counting to 100 by ones: Counting to 100 by ones · Learn more about counting to 100 by tens
- Counting on from any number, such as starting at 16 and saying 17, 18, 19, 20. Learn more: Counting on from any number
- Showing numbers 11 to 19 as ten ones and more ones with objects or drawings, like 15 = 10 + 5. 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
- Count 10 crackers into one pile and a few more into a second pile. Name the teen number together, like ten and 6 make 16.
- Count jumping jacks together, starting from a number your child picks, like 18. Keep going and see how high you can get.
- Count to 100 by tens with high fives, one high five for each ten. Then try counting by ones from 50 to 60.
Where kids can get stuck
- Pausing at a number like 69, unsure that 70 is the ten that comes next.
- Counting the starting number as a step, so 3 more than 5 lands on 7 instead of 8.
- Making the ten with 9 or 11 objects, because they lost count while building it.
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 number
- A number from 11 to 19, 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.
- count by tens
- Saying 10, 20, 30, and on, adding one group of ten each time.
- hundred
- The number 100, which is ten tens.
Want to help your child master numbers to 100?
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 Zearn Math Kindergarten Mission 5 cover?
Zearn Math Kindergarten Mission 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.