Division as sharing and grouping
The Maths Habit
How many dots are there? Multiply.
3 × 7 = 212This array shows 4 × 9. Write the fact turned round.
9 × 4 = 363Work out 6 × 7. Split the rows into facts you know.
35 + 7 = 42
The counters are dealt out to the plates, one at a time, so every plate gets the same. What happens at the end?
Some are left over: not enough to go round again.
- Divide
- Split a total into equal groups.
- Share
- Give out equally, one at a time.
- Group
- A set with the same number in each.
- Remainder
- What is left over after the equal groups.
- Ring groups of 3.Set the counters out in rows of 3. Each row is one group.
- How many groups?Count the rings.
- 15 ÷ 3 = 5Check it with the times table: 5 × 3 = 15.
5 groups
5 each
Both are 15 ÷ 3 = 5. Deal one to each player: each round is a row.
How many groups of 4?
5 × 6 = 30. What is 30 ÷ 6?
Work out 21 ÷ 3. Ring groups of 3. How many groups? 21 ÷ 3 = 7
Work out 24 ÷ 4. Ring groups of 4. How many groups? 24 ÷ 4 = 6
Work out 21 ÷ 3. Ring groups of 3. How many groups? 21 ÷ 3 = 7
Work out 35 ÷ 5. Ring groups of 5. How many groups? 35 ÷ 5 = 7
Work out 21 ÷ 3. Ring groups of 3. How many groups? 21 ÷ 3 = 7
Work out 27 ÷ 9. Ring groups of 9. How many groups? 27 ÷ 9 = 3
Work out 21 ÷ 3. Ring groups of 3. How many groups? 21 ÷ 3 = 7
Share 12 cards between 4 players, one at a time. How many does each get? 3 each: 12 ÷ 4 = 3
Work out 21 ÷ 3. Ring groups of 3. How many groups? 21 ÷ 3 = 7
Work out 16 ÷ 2. Ring groups of 2. How many groups? 16 ÷ 2 = 8
Ring groups of 5. Is anything left over?
Ring groups of 6. Is anything left over?
- Ring groups of 4.
- How many groups?
- How many left over?Not enough to make another group.
- 14 ÷ 4 = 3 r 2r means remainder: what is left over. In a story, decide: does everyone need a place? Round up. Only full groups count? Round down.
A taxi takes 4 people. 18 people need taxis. 18 ÷ 4 = 4 r 2. Round up or round down?
Stickers go in packs of 5. How many full packs from 23 stickers? 23 ÷ 5 = 4 r 3. Round up or round down?
Work out 19 ÷ 4. Ring groups of 4. How many groups? How many left over? 19 ÷ 4 = 4 r 3
A table seats 6. 32 guests need tables. How many tables? Ring groups of 6. How many groups? How many left over? 32 ÷ 6 = 5 r 2, so 6 tables
Work out 19 ÷ 4. Ring groups of 4. How many groups? How many left over? 19 ÷ 4 = 4 r 3
Cakes go in boxes of 4. 23 cakes. How many full boxes? Ring groups of 4. How many groups? How many left over? 23 ÷ 4 = 5 r 3, so 5 full boxes
Answer sheet
Thumbs up to round up, down to round down.
Taxis for a group, 4 in each taxi
Round upFull packs of 6 from loose pens
Round downShelves for books, 8 on each shelf
Round upFull teams of 5 from a class
Round downBoxes to post 50 mugs, 12 in a box
Round up
I am thinking of a number. In groups of 5 it makes 3 groups with 4 left over. What is my number?
19Find a number under 30 that leaves 1 left over in groups of 2, in groups of 3 and in groups of 4.
13 or 25Which leaves more left over: 47 ÷ 6 or 47 ÷ 5?
47 ÷ 6: 5 left over
Work out 20 ÷ 5. Ring groups of 5. How many groups?
20 ÷ 5 = 46 × 4 = 24. Use it to work out 24 ÷ 6.
426 people go to a match. A car takes 4 people. How many cars do they need?
6 r 2, so 7 cars