Practise even and odd numbers to 100 worksheets the see-it-first way — Two-digit numbers with the ones digit boxed — the last digit alone tells you even or odd. Every sheet prints with a matching answer key. Free, no signup.
Opens the builder set to numbers to 100 · 8 numbers per sheet · free, no signup.
Once numbers grow past twenty, counting dots stops being practical, so even and odd are decided by the ones digit alone: if it ends in 0, 2, 4, 6 or 8 the whole number is even; 1, 3, 5, 7 or 9 makes it odd. The tens never matter. Boxing the last digit trains the eye to look exactly where it counts.
Quick way to teach it: Cover everything except the last digit. 0, 2, 4, 6, 8 → even; 1, 3, 5, 7, 9 → odd. It works no matter how big the number gets — 48 is even because of the 8, 73 is odd because of the 3.
Cover everything except the last digit. 0, 2, 4, 6, 8 → even; 1, 3, 5, 7, 9 → odd. It works no matter how big the number gets — 48 is even because of the 8, 73 is odd because of the 3. Print a fresh sheet, work a few numbers together each day, and check with the answer key — short, regular practice beats one long session.
This is usually taught in Grade 1 & Grade 2. Once numbers grow past twenty, counting dots stops being practical, so even and odd are decided by the ones digit alone: if it ends in 0, 2, 4, 6 or 8 the whole number is even; 1, 3, 5, 7 or 9 makes it odd. The tens never matter. Boxing the last digit trains the eye to look exactly where it counts.
An even number can be split into two equal groups with nothing left over — 0, 2, 4, 6, 8 and any number ending in those digits. An odd number always leaves one left over — 1, 3, 5, 7, 9 and any number ending in those. Every whole number is exactly one or the other.
Zero is even. It splits into two equal groups (nothing and nothing) with nothing left over, and it sits between two odd numbers, −1 and 1, in the counting pattern. Its last digit is 0, which is one of the even digits.