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CLIP 10244

# Subtracting tens from a two-digit number

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Key Info
• Subtracting tens from a two-digit number
• Duration: 01:32
• How to subtract 10 from a two-digit number, illustrated by an animation of 68 ants departing on leaf boats in tens. The ants are sent off in teams of 10 to participate in an ant Regatta. As the boats depart we see 10 being taken away from 68, and then from 58 etc on a note pad. Eventually there are only eight ants remaining who get into the last boat. The animation closes with the Regatta.
• Subject:

Topic:

## Calculations: Subtraction

• Keywords: subtraction, subtract, take away, minus
Ideas for use in class
• The impetus for a discussion about how taking away 10 from a two-digit number only changes the 10s number. Ask what pattern the children see in the answers and see if they can explain it.
Background details
• Clip language : English
• Aspect ratio : 16x9