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Math · Grade 3 Math

Chapter 1: Multiplication and Division as Equal Groups

Division as Sharing

Splitting a total into equal shares.

Lesson
3
Time
About 12 minutes
0 of 9 done
Part 1 of 7Let's Learn

Step 1: Let's Learn

Read it, or press Listen and follow the words.

Watch the idea first — 56 seconds. Then read on, and try it yourself in the next step.

If 12 sweets are shared equally between 3 people, how many does each get?

That question is written 12 ÷ 3.

Division splits a total into equal groups. The symbol is ÷.

The answer has a name too.

Quotient is the answer to a division.

Equal is the whole point

Sharing 12 as 5, 4 and 3 is not division. The shares have to match.

Step 2: Try It Yourself

Tap and try it out.

Set how many apples and how many people. Each row is one person’s share.

12 ÷ 3 = 4

12 shares evenly: each of the 3 groups gets 4, and the pen stays empty.

The same total, laid out every way it goes. What will not fit sits outside.

3 × 4 = 12. 3 and 4 are a factor pair of 12.

Pairs you have found

  • 3 × 4

Step 3: In Real Life

At a birthday party

There are 24 slices of pizza and 6 children, and everyone gets the same. That is 24 ÷ 6, so 4 slices each. A parent does this sum every time something has to be shared fairly, from sweets to turns on the tablet.

Step 4: Watch an Example

One step at a time.

Watch Ana Share 12 Sweets

Ana shares 12 sweets equally between 3 friends.

  1. Step 1

    She deals one to each friend in turn, going round.

Step 5: Your Turn

Practice makes it stick.

The Party

Problem 1 of 2

20 balloons are shared equally between 5 children. How many does each get?

balloons

The Library

Problem 2 of 2

18 books are put equally onto 3 shelves. How many on each shelf?

books

Share It Out

1 of 4

10 ÷ 2 = ?

2 of 4

15 ÷ 5 = ?

3 of 4

16 ÷ 4 = ?

4 of 4

20 ÷ 10 = ?

Build the Array

Build it, then check.

Build 3 rows of 4.

Set the rows and the columns.

1 = 1

1 row of 1 makes 1.

Step 6: Quick Check

Show what you know.

Question 1 of 2

24 ÷ 4 = ?

Question 2 of 2

What must be true about the shares?

What You Learned

  • Division splits a total into equal shares.
  • 12 ÷ 3 asks how many are in each of 3 shares.
  • The answer is called the quotient.
For the grown-up

This lesson is where the child interprets a quotient as the number in each share when a total is split equally. Multiplication is equal groups before it is a fact to recall. Three fours is three groups of four, and division is the same picture asked from the other end.

Watch for multiplication and division being learned as separate subjects. They are one relationship, and a child who sees that halves what there is to remember.

When they are stuck on a division, ask the multiplication instead: "what times 4 gives 24?" Nearly every child can answer that when they cannot answer 24 divided by 4.

Sharing out fairlyYou have 12 sweets and 3 friends. Deal them out one at a time, going round and round, until they run out. Each friend ends up with 4. That is 12 ÷ 3 = 4. Dealing is a real procedure you can carry out with objects, which is why sharing is the first meaning of division children meet.

The other meaning: making groupsThere is a second question that also gives 12 ÷ 3. Instead of "12 shared between 3 people", ask "how many groups of 3 can I make from 12?" The answer is again 4. These two questions feel completely different but the same division answers both. Noticing this is a real step forward.

When it does not come out evenlyShare 13 sweets between 3 friends and each gets 4 with one left over. That leftover is called a remainder. Most divisions here come out exactly, but knowing leftovers exist stops you assuming every division is tidy.

Deal them out one at a time12 sweets shared between 3 children. Give one to each: three gone, nine left. Again: six gone, six left. Again: nine gone, three left. Again: all gone. Count what one child has. Four. 12 ÷ 3 = 4