Go Math! Grade 3, Chapter 5: Use Multiplication Facts
In this unit, your child puts multiplication facts to work. They find missing factors in sentences like 7 × ? = 56, learn the 7s, 8s, and 9s, and multiply by multiples of 10, such as 5 × 60. Knowing facts this well sets up the next unit, where division begins as the opposite of multiplication.
By Robert “Bobby” BarnettMath teacher, parent, and founder of Bobby’s Math Club
What is my child learning in Chapter 5?
- Finding an unknown factor, like the missing number in 7 × ? = 56, by thinking which 7s fact makes 56. Learn more: Finding the missing number, like 7 x ? = 56
- Adding the 7s, 8s, and 9s to the facts they know, aiming to recall each one without counting. Learn more about knowing the times tables by heart: Knowing the times tables by heart · Learn more about dividing within 100
- Multiplying by multiples of 10, such as 5 × 60 = 300, with base-ten blocks and number lines. Learn more: Multiplying by tens, like 4 x 70
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 the missing number? ? × 2 = 18
- 16
- 9
- 36
How you can help
- Play a guess-my-number game on a ride: say you multiplied a number by 8 and got 48, and ask your child for the number (6).
- Count out dimes in 5 piles of 6 and ask what they are worth all together: 5 × 60 = 300 cents, or $3.
- Pick a tricky fact for the day, like 7 × 8 = 56, and ask it at breakfast, lunch, and bedtime.
Where kids can get stuck
- Multiplying the two numbers shown in 7 × ? = 56, writing 392 because the blank is usually the answer.
- Writing the wrong number of zeros, so 5 × 60 becomes 30 or 3,000 instead of 300.
- Mixing up 7 × 8 = 56 and 6 × 9 = 54, two answers that sound close.
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
- unknown factor
- A factor we do not know yet and need to find.
- factor
- One of the numbers you multiply, like 4 and 6 in 4 × 6.
- product
- The number you get when you multiply two factors.
- multiple of 10
- A number you say when counting by tens, like 30 or 80.
- tens
- The place just left of the ones, worth groups of 10.
- equation
- A number sentence with an equal sign, like 6 × 4 = 24.
- fluently
- Easily and accurately, the way you know your own name.
Want to help your child master using times tables?
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 Go Math! Grade 3 Chapter 5 cover?
Go Math! Grade 3 Chapter 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.