Adding and Taking Away up to 20
Free to teach as-is — the teacher guide, student handout, and slides are included.
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Objective
I can accurately solve addition and subtraction problems within 20.
Part 1 of 4
Warm-up video
Numberock · 2:58
We don't generate video — this one is by Numberock on YouTube. The practice questions and exit ticket below were drafted by AI for this objective, and every question is editable in the teacher guide.
Part 2 of 4
Key concepts
3 concepts
- 1
On a number line, numbers are shown as distances and marked with points spaced equally apart.
- 2
When adding numbers on a number line, you jump forward to the right to find the sum.
- 3
When subtracting numbers on a number line, you jump backward to the left to find the difference.
Part 3 of 4
Practice
9 questions
What is a number line used for when you want to add or subtract numbers? You can draw a picture to show your idea.
Imagine you have 7 red balls and get 3 more blue balls. How many balls do you have now? Show how you would find the answer on a number line. You can draw your number line or use pictures to help you.
Part 4 of 4
Exit ticket
Quick comprehension check
“Solve the following problems. You can use drawings or a number line to show your work. a) 14 + 5 = b) 19 - 7 =”
Sample answer included in the free materials
Get the materials
Teacher guide, student handout, and slides — free, in Google Docs format
Teacher Guide
Complete lesson plan with answer keys and alternate activities
Student Handout
Printable worksheet
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