Idea 7of 24Builds onNines from tens
Share out, or make groups
What two questions can a division answer?
Today you'll discover
- how sharing deals things out
- how grouping packs things up
- why both are division
Think first8 friends share 48 stickers
8 friends share 48 stickers equally. How many does each friend get?
Decide first, then press Next. Ask: do I know the number of groups, or the size of each?
A pile of 48 dots. Circles for 8 friends appear and the dots move into them one round at a time until each holds 6, then 48 ÷ 8 = 6. Then 48 muffins are packed 6 to a box into 8 boxes, and 48 ÷ 6 = 8 with the check 8 × 6 = 48. The last step shows 60 apples and bags of 5.
See the whole ideathe big idea and the key word, in one place
The big idea
Division asks how many in each group, or how many groups there are.
Compare themSharing: 48 among 8 friends, how many each? Grouping: 48 in boxes of 6, how many boxes? Both are 48 ÷ something.
Easy to get wrongDividing whole numbers like these makes fewer: 60 ÷ 5 = 12 bags, far fewer bags than apples.
Key words
- sharing
- dividing into a known number of equal groups to find how many go in each
- grouping
- dividing into groups of a known size to find how many groups there are
Ready to use it?
- Say whether a division story shares or groups.
- Solve a sharing or a grouping story.