Go Math! Grade 1, Chapter 6: Count and Model Numbers
In this unit, first graders count to 120, read and write numerals, and model two-digit numbers with tens and ones. They see that 34 is 3 tens and 4 ones and begin to compare numbers using place value, what each digit is worth. After the fact families of the last unit, this shifts to bigger numbers, and next they compare two-digit numbers with symbols.
By Robert “Bobby” BarnettMath teacher, parent, and founder of Bobby’s Math Club
What is my child learning in Chapter 6?
- Counting to 120 by ones and tens, and reading and writing numerals, including the ones from 100 to 120. Learn more: Counting, reading, and writing numbers to 120
- Modeling two-digit numbers with tens and ones, so 34 is 3 tens and 4 ones, and 50 is 5 tens and 0 ones. Learn more: Tens and ones in two-digit numbers
- Using tens and ones models to decide which of two numbers is greater or less. Learn more: Comparing two-digit numbers with >, =, and <
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
Count by tens: 10, 20, 30, 40, __. What number comes next?
- 51
- 50
- 60
How you can help
- Count a jar of pasta or cereal by grouping it in tens on the table, then count the groups by tens and the leftovers by ones.
- Read numbers you see on signs, receipts, or book pages, and ask how many tens and ones each one has.
- Build two numbers with bundles of straws, like 34 and 43, and ask which is greater. Talk about why the same digits make different numbers.
Where kids can get stuck
- Counting "98, 99, 100, 200" instead of moving on to 101.
- Writing 43 when they mean 34, mixing up which digit shows the tens.
- Showing 50 as 5 single sticks, treating the zero as if it weren't there.
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
- numeral
- The written symbol for a number, like 25.
- tens
- Groups of ten. In 34, there are 3 tens.
- ones
- Single things not in a group of ten. In 34, there are 4 ones.
- digit
- One of the symbols 0 to 9 used to write numbers.
- place value
- What a digit is worth because of its spot, like the 4 in 42 meaning 40.
- hundred
- Ten tens, written 100.
- greater
- Bigger in amount.
- less
- Smaller in amount.
Ready to build your child’s confidence with tens and ones?
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 Go Math! Grade 1 Chapter 6 cover?
Go Math! Grade 1 Chapter 6 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.