Odd and Even Numbers

Aligned to 2.OA.C.3 — Common Core State Standards for Mathematics.

What this lesson teaches

A number is even if you can split the objects into two equal groups with none left over. If one is left over, it is odd.

Example 1

Is 6 even? Split into two equal groups: 3 and 3, none left over. So 6 is even, and 3 + 3 = 6.

Example 2

Is 9 even? Split it into two groups: 4 and 4, with 1 left over. One is left, so 9 is odd.

Example 3

Every even number ends in 0, 2, 4, 6, or 8. That is why 26 is even and 27 is odd without splitting anything.

Every lesson comes with a video taught in English and Spanish — the same video the QR code in the printed workbook opens.

Un número es par si puedes separar los objetos en dos grupos iguales sin que sobre ninguno. Si sobra uno, es impar.

Ejemplo 1: ¿6 es par? Sepáralo en dos grupos iguales: 3 y 3, no sobra ninguno. Entonces 6 es par, y 3 + 3 = 6.

Ejemplo 2: ¿9 es par? Sepáralo en dos grupos: 4 y 4, y sobra 1. Sobra uno, así que 9 es impar.

Ejemplo 3: Todo número par termina en 0, 2, 4, 6 u 8. Por eso 26 es par y 27 es impar sin tener que separar nada.

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