Adding and Subtracting within 10
Aligned to K.OA.A.1 — Common Core State Standards for Mathematics.
What this lesson teaches
Adding means putting groups together to find how many in all; subtracting means taking some away to see how many are left. We can use fingers or objects to show it.
Worked examples
Example 1
3 apples and 2 more apples: 3 + 2 = 5 apples. If you eat 1, then 5 − 1 = 4 apples are left.
Example 2
4 crayons are on the table and you put 1 more in the box: 4 + 1 = 5 crayons. Hold up 4 fingers, then one more — that is 5.
Example 3
6 grapes are on your plate and you eat 2: 6 − 2 = 4 grapes left. Taking away always makes the group smaller.
Practice questions
- Show 2 + 3 using your fingers.
- You have 6 stickers and give away 2. How many left?
- Make 5 in two different ways (like 4+1 and 3+2).
Watch the lesson
Every lesson comes with a video taught in English and Spanish — the same video the QR code in the printed workbook opens.
▶ Watch this lessonEn español
Sumar y restar hasta el 10
Sumar significa juntar grupos para saber cuántos hay en total; restar significa quitar algunos para ver cuántos quedan. Podemos usar los dedos o materiales concretos para representarlo.
Ejemplo 1: 3 manzanas y 2 manzanas más: 3 + 2 = 5 manzanas. Si te comes 1, entonces 5 − 1 = 4 manzanas quedan.
Ejemplo 2: Hay 4 crayones en la mesa y pones 1 más en la caja: 4 + 1 = 5 crayones. Levanta 4 dedos y luego uno más — eso es 5.
Ejemplo 3: Hay 6 uvas en tu plato y te comes 2: 6 − 2 = 4 uvas quedan. Quitar siempre hace el grupo más pequeño.
More Operations & Algebraic Thinking lessons
Teach this lesson today
An AI tutor that guides with questions instead of just giving answers — all K–12 core subjects, every child in the family.
Start free — no card required