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Use addition and subtraction strategies to solve problems with multiples of 100

Lesson details

Learning outcome

I can use addition and subtraction to solve problems with multiples of 100

Key learning points

  1. Known facts help us to add and subtract multiples of 100
  2. Unitising can help us to add and subtract multiples of 100
  3. Adding and subtracting multiples of 100 can be represented in different ways.

Keywords

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

Common misconception

For some questions in this lesson, there is more than one possible answer, but all may not provide the solution to the problem posed. Pupils may give the first (incorrect) answer that they find.

For the second task, encourage pupils to distinguish between questions that only have one solution and those that have multiple solutions. Modelling your thinking throughout the second learning cycle is key to supporting pupils to access the task.

Teacher tip

Throughout the lesson, encourage pupils to write the values of each bar on the bar graphs. This can help manage the cognitive load they will experience in trying to hold this information to successfully answer questions.

Licence

This content is © Oak National Academy Limited (2025), 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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Prior knowledge starter quiz

6 Questions

Q1.
What is one hundred less than 1,000?

Correct Answer: 900

Q2.
400 + 300 =

Correct Answer: 700

Q3.
1,100 − 300 =

Correct Answer: 800

Q4.
Which symbol could be used to make this correct?

An image in a quiz
>
<
Correct answer: =

Q5.
Match each equation to the correct answer.

Correct Answer:400 + 400 = ,800

800

Correct Answer:900 + 200 =,1,100

1,100

Correct Answer:1,400 − 400 =,1,000

1,000

Correct Answer:1,200 − 300 = ,900

900

Q6.
What number would make this equation correct?

An image in a quiz
Correct Answer: 800

6 Questions

Q1.
Five children played a game. Which two children scored exactly 900 points between them?

An image in a quiz
Aisha
Correct answer: Izzy
Correct answer: Jacob
Jun
Sam

Q2.
Five children played a game. Who scored 400 points more than Aisha?

An image in a quiz
Aisha
Izzy
Jacob
Correct answer: Jun
Sam

Q3.
Five children played a game. Which two children scored a total of 1,300 points?

An image in a quiz
Aisha
Izzy
Correct answer: Jacob
Jun
Correct answer: Sam

Q4.
Five children played a game. Who scored 300 fewer points than Jun?

An image in a quiz
Aisha
Correct answer: Izzy
Jacob
Jun
Sam

Q5.
Five children played a game. How many points did Jun and Sam score altogether?

An image in a quiz
Correct Answer: 1,500, 1500

Q6.
Five children played a game. Three children scored 1,400 points between them. Which three children scored 1,400 points?

An image in a quiz
Correct answer: Aisha
Correct answer: Izzy
Jacob
Correct answer: Jun
Sam

To help you plan your 4 maths lesson on: Use addition and subtraction strategies to solve problems with multiples of 100, download all teaching resources for free and adapt to suit your pupils' needs...