Mathematics
Multiplication & Division
Conceptual
9–10 yrs
Prime numbers
质数
Description
Know and use the vocabulary of prime numbers, prime factors, and composite numbers; establish whether a number up to 100 is prime; recall prime numbers up to 19
Mastery Evidence
- Explain that a prime number has exactly two factors: 1 and itself
- Determine whether 51 is prime or composite and justify the answer
- List all prime numbers up to 19 from memory
Assessment Prompt
Can your child tell you what makes a number 'prime' — that it only divides exactly by 1 and itself — and give some examples like 7, 11, and 13?
Prerequisites 1
Factors, multiples, and primes
在推断哪些数恰好有两个因数（质数）之前，必须先找出因数对
Unlocks 0
No follow-up topics
