Eureka Math Grade 4, Module 3: Multi-Digit Multiplication and Division
In this unit, your child multiplies up to four digits by one digit and two-digit numbers by each other, and divides up to four digits by one digit, with remainders. Along the way they read multiplication as "times as many," find factors and multiples, and use area and perimeter. It builds on metric conversions and leads into angles and shapes.
By Robert “Bobby” BarnettMath teacher, parent, and founder of Bobby’s Math Club
What is my child learning in Module 3?
- Writing comparison sentences for facts like 24 = 6 × 4, so 24 is 6 times as many as 4. Learn more: Reading multiplication as "times as many"
- Solving comparison story problems with tape diagrams, deciding whether to multiply or divide to find the unknown. Learn more: Story problems about "times as many"
- Solving multi-step story problems with all four operations, and deciding what to do with a remainder. Learn more: Multi-step story problems and leftovers
- Finding factor pairs and multiples of numbers to 100, and sorting numbers as prime or composite. Learn more about finding factors and multiples up to 100: Finding factors and multiples up to 100 · Learn more about spotting prime numbers
- Multiplying with place value disks, area models, and partial products, then connecting them to the written method. Learn more about multiplying large numbers by a one-digit number: Multiplying large numbers by a one-digit number · Learn more about multiplying two two-digit numbers
- Dividing up to four-digit numbers by one-digit divisors, with and without remainders, using place value disks and area models. Learn more: Dividing with remainders, like 87 ÷ 5
- Using area and perimeter formulas for rectangles, and finding a missing side when one side and the area are known. Learn more: Using area and perimeter to solve real problems
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 man is 6 feet tall. A giraffe is 3 times as tall as the man. Which equation finds g, the giraffe's height in feet?
- g = 3 × 6
- 6 = 3 × g
- g = 3 + 6
How you can help
- Draw a rectangle on a napkin with sides of 4 and 126. Ask your child to split the long side into 100, 20, and 6, find the area of each part, and add them to get 504.
- Share 75 paper clips among 6 people. Ask how many each gets and how many are left over, then check by multiplying back: 6 × 12 + 3 = 75.
- Compare two lengths on a walk. If your step is 2 feet and a bench is 3 times as long, ask how long the bench is, and how long "3 feet longer" would be.
Where kids can get stuck
- Multiplying only the matching places, missing two of the four partial products in a problem like 64 × 38.
- Dividing 1,452 by 6 and getting 232, without checking that 232 × 6 is only 1,392.
- Thinking every odd number is prime, so 21 seems prime even though 21 = 3 × 7.
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
- times as many
- A way to compare two amounts by saying how many copies of one make the other.
- factor
- A number that multiplies with another number to make a given number, like 4 in 4 × 6 = 24.
- multiple
- The product of a number and a whole number, like 6, 12, and 18 for the number 6.
- prime number
- A number greater than 1 with exactly two factors, 1 and itself, like 7.
- partial products
- The smaller products you get by multiplying each place separately, which are then added together.
- quotient
- The answer to a division problem.
- remainder
- The amount left over when a number can't be split into equal groups exactly.
- area
- The space inside a flat shape, measured in square units.
- perimeter
- The distance all the way around a flat shape.
Ready to build your child’s confidence with multiplication and division?
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 3 cover?
Eureka Math Grade 4 Module 3 covers these math standards. Each one links to what it means, sample questions, and teaching strategies.
- 4.OA.A.1: Understand "times as many": 35 is 5 times as many as 7.
- 4.OA.A.2: Solve "times as many" word problems by multiplying or dividing.
- 4.OA.A.3: Solve word problems with several steps, including ones with remainders.
- 4.OA.B.4: Find factors and multiples up to 100, and spot prime numbers.
- 4.NBT.B.5: Multiply larger numbers, like 3,045 × 8 and 64 × 38.
- 4.NBT.B.6: Divide by a one-digit number, with remainders, like 87 ÷ 5.
- 4.MD.A.3: Solve problems with the area and perimeter of rectangles.
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.