New
New
Year 2

# Represent multiples of ten in an expression or an equation

I can represent multiples of ten in a calculation.

New
New
Year 2

# Represent multiples of ten in an expression or an equation

I can represent multiples of ten in a calculation.

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## Lesson details

### Key learning points

1. Multiples of ten can be represented with addition of tens.
2. 10 + 10 + 10 is equal to three tens which is equal to 30
3. An expression shows the number of groups being added.
4. An equation includes the sum or total shown using =

### Common misconception

Children may think that each group of ten is worth more than the last when we count up in tens.

Ensure children understand that we count all as we go along to find how many things are in a group, the last number we say tells us how many there are.

### Keywords

• Multiple - A multiple is the result of multiplying a number by another whole number.

• Expression - Contains one or more values, where each value is separated by an operator such as the addition symbol +

• Equation - An equation is used to show that one number or calculation is equal to another.

Take time for children to practise writing expressions and equations using + and = symbols. Saying these aloud using 'plus' and 'is equal to' will develop their understanding and use of the abstract symbols.
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).

## Starter quiz

### 6 Questions

Q1.
Say the count. What number will Laura say next?
Q2.
Say the count. Laura is counting backwards. What number will Laura say next?
Q3.
Look at this section of a 100 square. What number is hidden by the counter?
Q4.
Look at this section of a 100 square. What number is hidden by the counter?
Q5.
Match the number name to the number of tens.

2 groups of 10

5 groups of 10

9 groups of 10

Correct Answer:one hundred,10 groups of 10

10 groups of 10

Q6.
Complete using the number word: is 7 groups of 10

## Exit quiz

### 6 Questions

Q1.
Which expression is represented by the number shapes?
3 + 3 + 3
Correct answer: 10 + 10 + 10
10 + 3
10 + 10 + 3
Q2.
Which equation is represented by the number shapes?
5 + 5 + 5 + 5 + 5 = 50
10 + 10 + 10 + 10 = 40
Correct answer: 10 + 10 + 10 + 10 + 10 = 50
10 + 5 = 15
Q3.
Write an expression that is represented by this image of bundles of 10 straws. Remember to use the plus symbol +
Correct Answer: 10 + 10 + 10 + 10
Q4.
Write an equation that is represented by this image of bundles of 10 straws. Remember to use the plus symbol + and the = symbol.
Correct Answer: 10 + 10 = 20, 20 = 10 + 10
Q5.
Mini erasers cost 10 p each and Izzy buys 9 erasers. How much does she spend? Which equation represents this problem?
10 + 9 = 19
Correct answer: 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 = 90
Q6.
Pens come in packets of 10 and Lucas buys 30 pens. How many packets has he bought? Select the equation that represents this problem.
10 + 30 = 40
Correct answer: 10 + 10 + 10 = 30
10 + 10 + 10 + 10 = 30