New
New
Year 2

Explain and represent multiplication when a group contains zero or one items

I can explain and represent multiplication when a group contains zero or one items.

New
New
Year 2

Explain and represent multiplication when a group contains zero or one items

I can explain and represent multiplication when a group contains zero or one items.

Lesson details

Key learning points

  1. You can explain and represent multiplication when a group contains zero or one items.
  2. The group size can be 1 and the number of groups can be 1
  3. If there are 3 groups of zero then we can write 0 + 0 + 0 or 3 x 0

Keywords

  • Zero - Zero is the number that represents no amount or objects. When we add zero to a number, the result is just the number, unchanged.

  • Group / grouping - A set of things with an identity.

Common misconception

Children may struggle to comprehend groups of zero. For example children may see four empty plates as four groups of one.

Use a context where the number of groups is still visible when the group size is zero. Remember to make the distinction as to what is representing zero. Use the familiar stem sentences There are ___ groups of ___.

For this lesson the focus is on a group size of zero or one and not zero or one groups; as the former can be more easily visualised and a repeated addition expression can still be written. The latter will be considered when commutativity is explored in later units.
Teacher tip

Licence

This content is © Oak National Academy Limited (2024), licensed on Open Government Licence version 3.0 except where otherwise stated. See Oak's terms & conditions (Collection 2).

Lesson video

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6 Questions

Q1.
Which multiplication expression matches this grouping of counters?
An image in a quiz
4 + 4 + 4 + 4
3 × 4
Correct answer: 4 × 4
4 × 5
Q2.
Here is a bar model. What multiplication expression does it represent?
An image in a quiz
Correct answer: 5 × 4
4 × 4
5 × 5
5 × 6
Q3.
Jacob has drawn some dots. Which of these representations does it match?
An image in a quiz
Correct Answer: An image in a quiz
An image in a quiz
3 + 3 + 3 + 3
Correct answer: There are 5 groups of 3
Q4.
Select the correct multiplication expression.
An image in a quiz
9 × 6
4 × 9
Correct answer: 9 × 5
9 × 4
Q5.
Look at the image which shows 4 groups of 3 How would you change 4 × 3 to show 3 × 3?
An image in a quiz
Correct answer: Remove 1 group of 3 bundles of sweets.
Add 1 group of 3 bundles of sweets.
Remove 2 bundles 3 sweets.
Add 2 bundles of 3 sweets.
Q6.
Look at the image which shows 4 groups of 4 How would you change 4 × 4 to show 4 × 3?
An image in a quiz
Correct answer: Remove one sandwich from each group.
Add one sandwich to each group.
Remove 1 group of sandwiches.
Add 1 group of sandwiches.

6 Questions

Q1.
Look at the image. Before, there were three groups of four milkshakes. After the party, there are three groups of ___ milkshakes.
An image in a quiz
Correct answer: zero
one
two
three
Q2.
Look at the image. Before, there were three groups of four milkshakes. After the party, there are three groups of ___ milkshake.
An image in a quiz
zero
Correct answer: one
two
three
Q3.
Look at the representation below. There are 8 empty plates. Select the correct multiplication expression for this.
An image in a quiz
5 × 0
6 × 0
7 × 0
Correct answer: 8 × 0
Q4.
Look at the representation below. Each vase has 1 flower. Select the correct multiplication expression for this.
An image in a quiz
5 × 1
Correct answer: 6 × 1
7 × 1
8 × 1
Q5.
Match the multiplication expressions to the addition expression.
Correct Answer:0 + 0,2 × 0

2 × 0

Correct Answer:0 + 0 + 0 + 0,4 × 0

4 × 0

Correct Answer:0 + 0 + 0,3 × 0

3 × 0

Correct Answer:1 + 1,2 × 1

2 × 1

Correct Answer:1 + 1 + 1 + 1 ,4 × 1

4 × 1

Q6.
Match the multiplication expressions to the correct groupings.
Correct Answer: 5 × 0 , 5 groups of 0

5 groups of 0

Correct Answer:5 × 1 ,1 + 1 + 1 + 1 + 1

1 + 1 + 1 + 1 + 1

Correct Answer:4 × 0, 0 + 0 + 0 + 0

0 + 0 + 0 + 0

Correct Answer:4 × 1,4 groups of 1

4 groups of 1