Eureka Math² Grade 4, Module 1: Place Value Concepts for Addition and Subtraction
In this unit, your child begins the year with numbers up to a million. They learn how each place relates to the next, read and compare large numbers, round them to any place, and add and subtract them in columns. They also solve multi-step story problems. Next, place value turns toward multiplying and dividing.
By Robert “Bobby” BarnettMath teacher, parent, and founder of Bobby’s Math Club
What is my child learning in Module 1?
- Seeing that moving a digit one place to the left makes it ten times as large, like 40 to 400. Learn more: Why each place is worth ten times the next
- Naming large numbers by their periods, like 305,018, and comparing two numbers by the first place where they differ. Learn more about reading and writing numbers up to a million: Reading and writing numbers up to a million · Learn more about comparing numbers up to a million
- Rounding large numbers to the nearest thousand, ten thousand, or hundred thousand by finding the halfway point. Learn more: Rounding big numbers to any place
- Adding and subtracting large numbers with the column method, explaining each regrouping step in place value terms. Learn more about adding numbers up to a million: Adding numbers up to a million · Learn more about subtracting numbers up to a million
- Solving multi-step story problems with large numbers, and using rounding to see whether an answer is reasonable. Learn more: Multi-step story problems and leftovers
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
Compare 40 thousands and 4 ten thousands. Which is true?
- 4 ten thousands is more
- They are equal
- 40 thousands is more
How you can help
- Read a big number from the news or a map, like a stadium crowd of 48,205. Ask your child to read it aloud and compare it with another crowd, like 48,520.
- Draw a number line from 4,000 to 5,000 together. Ask your child to mark 4,350 and 4,820, then decide which thousand each is closer to.
- Plan a savings goal. If a game costs $400 and the family has saved $236, ask how much more is needed, and have your child talk through each regrouping step.
Where kids can get stuck
- Looking at the wrong digit, so 6,812 rounded to the nearest thousand becomes 6,000.
- Writing 6,812 rounded to the nearest hundred as 6,810 instead of 6,800.
- Seeing 500 as 450 more than 50, but not as ten times 50.
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
- place value
- The value a digit has because of its place in a number.
- digit
- Any of the symbols 0 through 9 used to write numbers.
- period
- A group of three places, like the thousands period, set off by commas.
- expanded form
- A number written as the sum of each digit's value, like 3,000 + 400 + 5.
- round
- To change a number to a nearby, easier number, like 6,812 to 7,000.
- halfway
- The point in the middle of two numbers; 4,500 is halfway between 4,000 and 5,000.
- algorithm
- A step-by-step method for solving a problem, like adding numbers in columns.
- regroup
- To trade 10 of one place for 1 of the next, like 10 tens for 1 hundred.
Want to help your child master place value and rounding?
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 Grade 4 Module 1 cover?
Eureka Math² Grade 4 Module 1 covers these math standards. Each one links to what it means, sample questions, and teaching strategies.
- 4.NBT.A.1: Know that each place is worth 10 times the place to its right.
- 4.NBT.A.2: Read, write, and compare numbers up to a million.
- 4.NBT.A.3: Round large numbers to any place, like 6,812 to 7,000.
- 4.NBT.B.4: Fluently add and subtract numbers up to a million.
- 4.OA.A.3: Solve word problems with several steps, including ones with remainders.
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.