Idea 6of 22Builds onShares as decimals
The shares make one whole
What do all the shares of one group add up to?
Today you'll discover
- why the shares add to 1
- why group size does not matter
- how to catch a mistake
Think firstRoom 12's shares as decimals
What do all of Room 12's shares add up to?
Decide first, then press Next. Watch the bottom cell of the share column.
Room 12's table with fractions and decimals; the bottom cell under the decimals shows 1.00. Then Room 14's table, 0.36, 0.24, 0.20, 0.20, also adding to 1.00, and as fractions to 25/25. The last step shows Ava's table where bike is written 0.20 and the shares add to 1.10.
See the whole ideathe big idea and the key word, in one place
The big idea
The shares of one group always add up to 1, the whole group.
Counts and sharesThe counts add to the total, 20. The shares add to 1. Both say the same thing: everyone was counted once.
Easy to get wrongRounding can make shares add to 0.99 or 1.01. A bigger miss, like 1.10, means a share is wrong.
Key word
- whole
- all of a group together; as a share, the whole is 1
Ready to use it?
- Check that a group's shares add to 1.
- Find the wrong share in a table.