Exploding Dots

5.3 (Optional) Division by 10

Use dots-and-boxes to compute \(2130 \div 10\).

Can you explain why, with unexplosions, the answer will be \(213\)? Do look for groups of ten in your picture.

 

Most people say that to divide a number that ends with zero by ten, just cross off the final zero from the number. Can you explain now why that action is sure to lead to the correct answer?

Please join the conversation on Facebook and Twitter and kindly share this page using the buttons below.
Share on Facebook
Facebook
Tweet about this on Twitter
Twitter

Resources

resources

Books

Take your understanding to the next level with easy to understand books by James Tanton.

BROWSE BOOKSarrow

resources

Guides & Solutions

Dive deeper into key topics through detailed, easy to follow guides and solution sets.

BROWSE GUIDESarrow

light bulb

Donations

Consider supporting G'Day Math! with a donation, of any amount.

Your support is so much appreciated and enables the continued creation of great course content. Thanks!

heart

Ready to Help?

Donations can be made via PayPal and major credit cards. A PayPal account is not required. Many thanks!

DONATEarrow