🔢 Parity 📚 Grade 3-4 ⏱ 6 min
Parity of Sums and Products: Patterns for Kids
The sum of two evens is always even, and odd plus even is always odd. These patterns train logical thinking.
Parity rules for addition
Patterns:
Even + even = even (4+6=10)
Odd + odd = even (3+5=8)
Even + odd = odd (4+5=9)
Even + even = even (4+6=10)
Odd + odd = even (3+5=8)
Even + odd = odd (4+5=9)
Checking with examples
Ask the child to check the rule on 5 different number pairs — the pattern holds every time.
The parity rule for multiplication
If at least one factor is even, the product is even. Only odd times odd gives an odd result.
FAQ
Why should kids know these rules?
They train the ability to spot patterns — a core skill in mathematical thinking.