Summary
Math Antics shows the place-value shortcut for multiplying and dividing by 10, 100 and 1000. A clear, animated 5-minute lesson you can drop straight into a grade 5 math block -- pause-friendly, with worked examples on screen.
Viewer safety
All ages
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Teaching resources
Discussion questions
Discussion
A few questions to talk through after watching “Multiply and Divide by Powers of 10.”
- What happens to the digits when you multiply by 10?
- Which way does the decimal point move when you divide by 100?
- Why does this shortcut work?
Quick work-a-long
Vocabulary: power of ten, place value, shift, decimal point, ten.
Try it: Multiply 3.2 by 100 and divide 450 by 10.