Subtracting Numbers within 20
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Objective
I can subtract numbers within 20 using objects or drawings.
Part 1 of 4
Warm-up video
HarperKids · 6:51
We don't generate video — this one is by HarperKids 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
When you subtract, you end up with less than what you started with.
- 2
4 - 2 = 2, so four buttons minus two buttons is two buttons.
- 3
5 - 4 = 1, so five bananas minus four bananas is one banana.
Part 3 of 4
Practice
6 questions
Gus has 3 drumsticks and drops 1. How many drumsticks does Gus have left?
Alligator has 4 cheeseburgers and gives 1 to Callie. How many cheeseburgers does Alligator have left?
Part 4 of 4
Exit ticket
Quick comprehension check
“Callie has 4 apples. She gives 1 apple to Pete. How many apples does Callie have now?”
Sample answer included in the free materials
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Teacher Guide
Complete lesson plan with answer keys and alternate activities
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