New
New
Year 1

Addition and subtraction within 10

I can use my knowledge of addition and subtraction within 10 when solving problems.

New
New
Year 1

Addition and subtraction within 10

I can use my knowledge of addition and subtraction within 10 when solving problems.

Lesson details

Key learning points

  1. Part + part = whole
  2. Whole − known part = unknown part

Common misconception

Children may misrepresent a given problem meaning they are led to calculate the solution incorrectly.

Children may identify the solution quickly when working with smaller numbers, but it is still important they are encouraged to visualise and represent each problem so that they know how to reveal the structure of the maths in more complex problems.

Keywords

  • Part - A piece or section of the whole.

  • Whole - All of a group or number.

  • Unknown - An unknown is a quantity that has a set value but it is represented by a symbol or letter.

  • Known - A given value.

Highlight addition and subtraction as it appears in situations throughout the day. This will allow for mathematical thinking beyond the lesson and emphasise to children that maths really is all around...
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).

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6 Questions

Q1.
Look at this image. Match the parts of the story.
An image in a quiz
Correct Answer:First,there were six pencils in a pot

there were six pencils in a pot

Correct Answer:Then,2 pencils were taken out of the pot

2 pencils were taken out of the pot

Correct Answer:Now,there are 4 pencils in the pot

there are 4 pencils in the pot

Q2.
This image shows a representation of a story. Order the parts of the story.
An image in a quiz
1 - First, there were 9 books on a shelf.
2 - Then, 4 books were taken off the shelf.
3 - Now, there are 5 books on the shelf.
Q3.
The cubes represent an addition equation. Which subtraction equation would undo this addition?
An image in a quiz
10 - 6 = 4
4 + 6 = 10
Correct answer: 10 - 4 = 6
Q4.
The cubes represent a subtraction equation. Which addition equation would undo this subtraction?
An image in a quiz
Correct answer: 2 + 6 = 8
8 - 6 = 2
8 - 2 = 6
Q5.
Which equations could this number line represent?
An image in a quiz
10 + 3 = 7
Correct answer: 10 - 3 = 7
3 + 7 = 10
Correct answer: 7 + 3 = 10
Q6.
Find half of each of these numbers.
Correct Answer:Half of 10,5

5

Correct Answer:Half of 2,1

1

Correct Answer:Half of 8,4

4

Correct Answer:Half of 4,2

2

Correct Answer:Half of 6,3

3

6 Questions

Q1.
Look at the bar model. 2 children had juice with their lunch. 5 children had water. How many children had a drink with their lunch? What is the missing whole?
An image in a quiz
Correct Answer: 7
Q2.
Look at the bar model. 9 children were having their lunch. 2 chose to eat a banana. The rest chose an apple. How many children chose an apple?
An image in a quiz
Correct Answer: 7
Q3.
Look at this image showing cheese sandwiches and ham sandwiches. Which sentences are true?
An image in a quiz
Correct answer: 4 children had cheese sandwiches
8 children had ham sandwiches
Correct answer: There were an equal number of ham sandwiches and cheese sandwiches.
Q4.
Look at the image. Jacob asks, "If I take 3 cups from the tray, how many cups will be left on the tray?" cups.
An image in a quiz
Correct Answer: 4
Q5.
There is a limit of 10 cups on a tray. How many more cups can be placed on this tray? more cups.
An image in a quiz
Correct Answer: 2, 2 more
Q6.
Which equation shows this story?
An image in a quiz
7 - 4 = 3
Correct answer: 7 - 3 = 4
7 + 4 = 3

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