Factor pairs, multiples, and prime or composite numbers.
Factors, Multiples and Primes teaches fourth graders to find factor pairs for numbers up to 100, list multiples and decide whether a number is prime or composite. These ideas make fractions, division and later algebra much easier.
Math course · Grade 4
Factors, Multiples and Primes · Learning goals
Find factor pairs of numbers to 100, list multiples, and decide whether a number is prime or composite.
Why it matters
Factors and multiples are the tools kids need to simplify fractions and find common denominators.
Prime numbers are a fun mystery in math, and exploring them builds a love of patterns.
Finding factors is times table practice in reverse, which deepens fact fluency.
Inside Factors, Multiples and Primes
A short read-aloud lesson first, then hands-on games and a quiz to lock it in.
Step 1 · Lesson
A short read-aloud lesson in 4 steps, with pictures and worked examples.
Step 2 · Game
Find the missing factor. (6 problems)
Step 3 · Game
What's the next multiple? (6 problems)
Step 4 · Game
Does it have only two factors? (6 problems)
Step 5 · Game
Find the rule and the next number. (6 problems)
Lesson preview
This is the real lesson text your child hears, read aloud by a friendly voice.
Factors are numbers that multiply to make another number. 3 and 4 are factors of 12 because 3 × 4 = 12.
Multiples are what you get when you skip count. Multiples of 4: 4, 8, 12, 16, 20.
A prime number has exactly two factors: 1 and itself. 7 is prime.
A composite number has more than two factors. 9 is composite because 3 × 3 = 9.
For parents
Learning sticks best when kids use it in real life. Here are simple ideas from this course.
Play "Prime or not?": call out numbers under 50 and race to decide if they're prime. Explain your reason by naming a factor pair.
Practice
Real questions from Factors, Multiples and Primes. Try them with your child, then tap to see the answer.
Question 1
8
Question 2
54
Question 3
prime
The full course has 24 questions with instant feedback, stars and rewards. Create a free account to play them all.
Factors, Multiples and Primes · Questions from parents
Factors, Multiples and Primes is a grade 4 math course for kids ages 9–10. That is Year 5 maths in the UK and Year 4 in Australia. It also works well for review in the next grade, or as a challenge for a confident younger learner.
Find factor pairs of numbers to 100, list multiples, and decide whether a number is prime or composite. Along the way they practice: Factor Pairs; Multiples; Prime or Composite?; Number Patterns.
About 10 minutes in total, split into 4 short levels. Most kids finish it over two or three sessions. Progress is saved, so they can stop any time and pick up where they left off.
Factors, Multiples and Primes is part of SkillBloom Premium, which unlocks every course in every subject. Each subject also has free courses, so your child can try SkillBloom before you decide.
No. Every lesson has a friendly read-aloud voice, questions are read aloud too, and the pictures help kids follow along. Confident readers can turn the voice off.
Yes. SkillBloom is built for homeschooling families. Kids work through lessons, games and quizzes on their own, and the parent dashboard shows what they finished and which skills need more practice. It works on phones, tablets and laptops.
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