Week 03 · Divide: share and group
Tuesday
How many groups?
// Fair shares and equal groups
⏱ about 15 min
Tuesday: How many groups?
Lucy has 20 sunflower seeds in her tiny green backpack.
"I want to give away little bags of 5 seeds," she says.
"But how many bags can I make?"
Bennie holds up an empty bag. "Let us fill one bag at a time."
"Put 5 seeds in a bag, then start the next bag."
"We keep going until all the seeds are used," says Lucy.
Learn it: make groups of the same size
Lucy has 20 seeds. She puts 5 seeds in each bag.
She fills 4 bags, with none left over.
We write 20 ÷ 5 = 4.
This time we knew how many go in each group.
The quotient, 4, tells how many groups.
Skip count by 5 to check: 5, 10, 15, 20. That is 4 fives.
HOW MANY GROUPS?
- Read the question.
- Tap your answer.
Lucy has 20 seeds. Each bag holds 5. How many bags?
Bennie has 18 apples. He puts 6 in each basket. How many baskets?
There are 14 socks. How many pairs of 2 can we make?
Riley has 27 puzzle pieces. Each puzzle uses 9. How many puzzles?SKIP COUNT TO DIVIDE
- Read the question.
- Tap your answer.
Skip count by 4 to 24. How many fours?
Skip count by 5 to 35. How many fives?
Skip count by 10 to 60. How many tens?
21 ÷ 3 = ?SHARE OR GROUP?
- Read the question.
- Tap your answer.
Lucy shares 12 leaves with 4 friends. What do we look for?
Lucy puts 12 leaves in piles of 4. What do we look for?
Bennie packs 30 stones in bags of 5. What do we look for?
Five friends share 30 stones fairly. What do we look for?
Skip count by the divisor.
| Sentence | True or false? |
|---|---|
| 20 ÷ 5 = 4 | ? |
| 18 ÷ 6 = 3 | ? |
| 27 ÷ 9 = 9 | ? |
| 24 ÷ 4 = 8 | ? |
WHY THIS EXERCISE27 ÷ 9 = 3, and 24 ÷ 4 = 6.
Try it
Count out 20 small things, like beans or buttons.
Make piles of 5 until none are left.
How many piles did you make?
Now try piles of 4. How many piles this time?
Make piles of 5 until none are left.
How many piles did you make?
Now try piles of 4. How many piles this time?
◇ GROUP IT WITH A GROWN-UP
Your grown-up counts out up to 30 small things.
Your grown-up says a group size, like 3 or 5.
You make equal groups and say the division.
Switch jobs and play three more rounds.
Your grown-up says a group size, like 3 or 5.
You make equal groups and say the division.
Switch jobs and play three more rounds.
Great grouping! Tomorrow we use multiplication to divide.