Everyday Mathematics Grade 2, Unit 5: 3-Digit Addition and Money
In this unit, your child adds three-digit numbers and solves problems with coins and dollar bills. They build on their place value work, adding hundreds to hundreds, tens to tens, and ones to ones. They also count mixed coins and write amounts with $ and ¢. Next, they put addition and subtraction together with bigger numbers.
By Robert “Bobby” BarnettMath teacher, parent, and founder of Bobby’s Math Club
What is my child learning in Unit 5?
- Adding three-digit numbers, like 365 + 248, by combining hundreds, tens, and ones, and trading 10 ones for a ten when needed. Learn more about adding within 1,000: Adding within 1,000 · Learn more about subtracting within 1,000
- Counting quarters, dimes, nickels, and pennies, adding dollars, and writing amounts like 75¢ or $3 correctly. Learn more about solving story problems by counting bills and coins: Solving story problems by counting bills and coins · Learn more about solving story problems about how much money is left
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 toy store had 450 toy cars and sold 120 of them. How many toy cars are left?
- 320
- 570
- 330
How you can help
- Empty a pocket or purse of coins onto the table. Sort them, then count the quarters first, followed by the dimes, nickels, and pennies, to find the total together.
- Read two prices under a dollar at the store, such as 45¢ and 30¢. Ask how much both would cost together and how your child figured it out.
- Keep a running score in a board game or card game, like adding 145 and 268. Ask your child to add the hundreds, then the tens, then the ones.
Where kids can get stuck
- Writing each place's total right into the answer, so 365 + 248 becomes 51013 instead of 613.
- Counting every coin as one cent, so a quarter, a dime, and a nickel seem worth 3¢, not 40¢.
- Thinking a nickel is worth more than a dime because the nickel is bigger.
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
- hundreds
- Groups of 100. The 3 in 352 means 3 hundreds, or 300.
- regroup
- To trade 10 ones for 1 ten, or 10 tens for 1 hundred, and back again.
- sum
- The answer when you add. In 8 + 5 = 13, the sum is 13.
- cent
- The value of one penny, written 1¢. One hundred cents make a dollar.
- quarter
- A coin worth 25 cents.
- dime
- A small coin worth 10 cents.
- nickel
- A coin worth 5 cents. It is bigger than a dime but worth less.
- dollar
- Worth 100 cents. It is written with the $ sign, like $1.
Want to help your child master three-digit addition and money?
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.
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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 Everyday Mathematics Grade 2 Unit 5 cover?
Everyday Mathematics Grade 2 Unit 5 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.