Reveal Math Grade 5, Unit 5: Division of Whole Numbers
In this unit, your child divides numbers up to four digits by two-digit divisors, like 480 ÷ 16. They use area models, partial quotients, and multiplication facts they already know, and decide what a remainder means in a story. It builds on the multiplication unit just before it and leads into multiplying decimals.
By Robert “Bobby” BarnettMath teacher, parent, and founder of Bobby’s Math Club
What is my child learning in Unit 5?
- Dividing up to four-digit numbers by two-digit divisors, using area models, partial quotients, and estimates, and interpreting remainders. Learn more: Dividing by two-digit numbers, like 480 ÷ 16
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
Which equation can you use to find 1,350 ÷ 45?
- 45 × ? = 1,350
- 1,350 × 45 = ?
- 45 ÷ 1,350 = ?
How you can help
- Divide something real together, like 1,000 sheets of paper into stacks of 25, or 480 crayons into boxes of 16. Ask your child to estimate first.
- Plan seating for a group: if 130 people sit in rows of 12, how many rows are needed? Talk about why the remainder means one more row.
- Ask your child to check each division by multiplying back, like 480 ÷ 16 = 30 because 16 × 30 = 480. Make it a habit at home.
Where kids can get stuck
- Choosing a partial quotient that is too large, like 20 sixteens for 288 ÷ 16, then not knowing how to back up.
- Leaving out a zero in the quotient, so 1,632 ÷ 16 comes out as 12 instead of 102.
- Ignoring what a remainder means in a story, so 130 people in rows of 12 gets 10 rows instead of 11.
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
- dividend
- The number being divided.
- divisor
- The number you divide by.
- quotient
- The answer to a division problem.
- remainder
- The amount left over when a number can't be divided evenly.
- partial quotient
- Part of a division answer, found in chunks that are added at the end.
- estimate
- A close guess found by rounding or using easy numbers.
- area model
- A rectangle split into parts to show multiplication or division.
Ready to build your child’s confidence with dividing by two-digit 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.
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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 Reveal Math Grade 5 Unit 5 cover?
Reveal Math Grade 5 Unit 5 covers this math standard. Each one links to what it means, sample questions, and teaching strategies.
- 5.NBT.B.6: Divide by a two-digit number, like 480 ÷ 16.
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.