i-Ready Classroom Mathematics Grade 4, Unit 3: Fraction Equivalence and Operations
In this unit, your child learns why fractions like 3/4 and 6/8 are equivalent and compares fractions with different denominators. Then they add and subtract fractions and mixed numbers with like denominators, and multiply a fraction by a whole number. It follows the multiplication and division unit and leads into decimals.
By Robert “Bobby” BarnettMath teacher, parent, and founder of Bobby’s Math Club
What is my child learning in Unit 3?
- Explaining with area models why multiplying the numerator and denominator by the same number gives an equivalent fraction. Learn more: Why fractions like 3/4 and 6/8 are equal
- Comparing fractions like 5/8 and 2/3 by renaming both with the same denominator, 15/24 and 16/24. Learn more: Comparing fractions like 2/3 and 5/6
- Adding and subtracting fractions and mixed numbers with like denominators, including stories about lengths and amounts. Learn more: Adding and subtracting fractions and mixed numbers
- Multiplying a whole number by a fraction, like 3 × 2/5 = 6/5, with models and equations. Learn more: Multiplying a fraction by a whole number
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? 4/5 = ?/10
- 4
- 9
- 8
How you can help
- Mix a batch of lemonade with a 1/4 cup. Ask how many scoops make 1 1/2 cups, and how your child knows it's 6.
- Use a ruler marked in eighths. Ask your child to compare a pen and a pencil, find the difference in eighths, and rename it in fourths if possible.
- Ask "more than half?" while pouring drinks, then compare two same-size glasses, 2/3 full and 5/8 full, and decide together which holds more.
Where kids can get stuck
- Adding numerators and denominators, so 1/4 + 2/4 becomes 3/8 instead of 3/4.
- Thinking larger numbers mean a larger fraction, so 4/12 seems more than 2/3.
- Getting 2 × 3/4 = 6/8, multiplying the denominator as well as the numerator.
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
- numerator
- The top number of a fraction, telling how many equal parts are counted.
- denominator
- The bottom number of a fraction, telling how many equal parts make one whole.
- equivalent fractions
- Fractions that name the same amount, like 3/4 and 6/8.
- common denominator
- The same denominator shared by two fractions, which makes them easy to compare or add.
- unit fraction
- A fraction with 1 as its numerator, like 1/4 or 1/8.
- mixed number
- A whole number and a fraction together, like 2 1/4.
- like denominators
- Denominators that are the same, as in 3/8 and 5/8.
- product
- The answer to a multiplication problem.
Ready to build your child’s confidence with fraction equivalence and operations?
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 i-Ready Classroom Mathematics Grade 4 Unit 3 cover?
i-Ready Classroom Mathematics Grade 4 Unit 3 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.