Eureka Math Grade 4, Module 1: Place Value Rounding and Algorithms for Addition/Subtraction
In this unit, your child starts the year with numbers up to a million. They see how each place is worth ten times the one to its right; read, compare, and round large numbers; and add and subtract them with the column method. They also solve multi-step story problems. Next, your child uses these skills to convert metric measurements.
By Robert “Bobby” BarnettMath teacher, parent, and founder of Bobby’s Math Club
What is my child learning in Module 1?
- Solving multi-step addition and subtraction story problems, drawing a tape diagram, and checking with a rounded estimate. Learn more: Multi-step story problems and leftovers
- Using a place value chart to show that 10 hundreds make 1 thousand, and 10 thousands make 1 ten thousand. Learn more: Why each place is worth ten times the next
- Reading numbers to a million aloud by their periods, writing them in expanded form, and comparing them with >, =, and <. 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 to any place with a vertical number line, deciding whether a number like 6,812 is closer to 6,000 or 7,000. Learn more: Rounding big numbers to any place
- Adding and subtracting multi-digit numbers in columns, regrouping as needed, including subtracting across zeros like 5,000 − 2,346. Learn more about adding numbers up to a million: Adding numbers up to a million · Learn more about subtracting numbers up to a million
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
A class of 28 students splits into 4 equal teams for a game. Then 2 new students join one of the teams. How many students are on that team now?
- 9
- 7
- 30
How you can help
- Use coins and bills if you have them: 10 pennies make a dime, 10 dimes make a dollar, and 10 dollars make a ten. Ask how many dimes are in $7, and why it is 70.
- Round a receipt total, like $347, to the nearest ten, $350, and the nearest hundred, $300. Then try a step-counter total like 36,718, rounded to the nearest thousand.
- Ask a two-step savings question: "You have $125, earn $40, then spend $68. How much is left?" Have your child estimate first, then solve and compare.
Where kids can get stuck
- Using "add a zero" as a trick without being able to explain why 60 × 10 = 600.
- Getting stuck when rounding causes a carry, writing 3,962 to the nearest hundred as 3,1000 instead of 4,000.
- Leaving out a place in expanded form, writing 30,405 as 30,000 + 4 + 5.
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.
- tape diagram
- A drawing of bars that shows how the amounts in a story problem compare.
Want to help your child master place value and big numbers?
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 Math Grade 4 Module 1 cover?
Eureka Math Grade 4 Module 1 covers these math standards. Each one links to what it means, sample questions, and teaching strategies.
- 4.OA.A.3: Solve word problems with several steps, including ones with remainders.
- 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.
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.