Eureka Math Grade 3, Module 2: Place Value and Problem Solving with Units of Measure
In this unit, your child uses place value, the value of a digit based on its spot in a number, to round, add, and subtract within 1,000. The numbers come from measuring: minutes on a clock, grams and kilograms on a scale, and liters in a container. Multiplication returns in the next unit, with the facts for 6, 7, 8, and 9.
By Robert “Bobby” BarnettMath teacher, parent, and founder of Bobby’s Math Club
What is my child learning in Module 2?
- Rounding measurements like 347 grams to the nearest 10 or 100 on a vertical number line to estimate. Learn more: Rounding to the nearest 10 or 100
- Adding and subtracting measurements within 1,000, such as 545 grams plus 278 grams, with regrouping. Learn more about adding within 1,000: Adding within 1,000 · Learn more about subtracting within 1,000
- Telling time to the nearest minute and adding or subtracting minutes on a number line to find elapsed time. Learn more about telling time to the minute: Telling time to the minute · Learn more about working out how many minutes have passed
- Measuring mass in grams and kilograms and liquid volume in liters, and estimating with benchmarks like a 1-liter bottle. Learn more: Weighing things and measuring liquids
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 is 43 rounded to the nearest 10?
- 50
- 40
- 30
How you can help
- Read the clock when your child starts and finishes a job, such as tidying a room from 4:35 to 4:52, and ask how long it took (17 minutes).
- Read package labels in the kitchen, such as a 400-gram box of pasta, and ask how many grams 2 boxes hold (800 grams).
- Round the weight or price on a grocery label to the nearest ten, such as 38 to 40, and ask your child why it is not 30.
Where kids can get stuck
- Misreading the hour hand when it is close to the next number, so 2:55 reads as 3:55.
- Reading a scale or measuring cup at the wrong line, skipping over what each mark stands for.
- Rounding 349 to 400 in two steps, 349 to 350 and then to 400, instead of asking which hundred is closer.
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 of a digit because of where it is in a number.
- round
- To change a number to a nearby number that is easier to use.
- estimate
- A number close to the exact answer that you find quickly.
- regroup
- To trade 10 ones for 1 ten, or 10 tens for 1 hundred, and back.
- elapsed time
- How much time passes from the start to the end of something.
- gram
- A small unit of mass; a paper clip is about 1 gram.
- kilogram
- A unit of mass equal to 1,000 grams; a big dictionary is about 1 kilogram.
- liter
- A unit of liquid volume; a large water bottle holds about 1 liter.
- mass
- How much matter is in an object, measured in grams or kilograms.
Want to help your child master place value and measurement?
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 3 Module 2 cover?
Eureka Math Grade 3 Module 2 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.