Summary
Dinosaurs demonstrate subtraction by taking some away from a group and counting what remains. A clear introduction to the minus sign.
Viewer safety
All ages
Gentle animated educational content, safe to show cold; still worth a quick preview to match it to your lesson.
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Teaching resources
Discussion questions
Talk about it
Subtracting means taking away. Start with the whole group, remove some, and count how many stay.
- If you have 5 and 2 hop away, how many are left?
- What does the minus sign (−) tell us to do?
- How is subtracting different from adding?
Quick work-a-long
Vocabulary: subtract, minus, take away, left.
Try it: Start with 6 crayons and take away 2. Count what's left and write the subtraction.