Year 3

Year 3

# Applying addition and subtraction strategies within context

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## Slide deck

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## Lesson details

### Key learning points

1. In this lesson, we will be implementing a variety of addition and subtraction strategies to real world scenarios.

### Licence

This content is made available by Oak National Academy Limited and its partners and licensed under Oak’s terms & conditions (Collection 1), except where otherwise stated.

## Video

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## Worksheet

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## Starter quiz

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### 4 Questions

Q1.
What does the word 'efficient' mean?
To do something badly.
To do something slowly.
Correct answer: To do something well without wasting energy.
Q2.
Which of these is not a strategy for subtracting efficiently?
Correct answer: Changing the order of the addends to make a calculation easier
Finding the difference
Partitioning and subtracting one part
Using known facts
Q3.
When calculating 50 - 48 which is an efficient strategy?
Correct answer: Count on to find the difference
Counting back on my fingers
Drawing out a number line
Partitioning and subtracting
Q4.
When calculating 92 - 57 which would be an efficient strategy?
Counting back on my fingers
Drawing out a number line
Correct answer: Partitioning and subtracting one part

## Exit quiz

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### 5 Questions

Q1.
I scored 13, 15 and double 9 on the dart board. What is my total?
37
Correct answer: 46
55
Q2.
I scored 11, triple 6 and double 8 on the dart board. What is my total?
39
Correct answer: 45
51
Q3.
I scored double 2, triple 10 and a bullseye. What is my total?
39
Correct answer: 84
88
Q4.
I have 300 points. I have just deducted 87 points. How many points do I have left?
113
203
Correct answer: 213
Q5.
I have 201 points. I have just deducted 93 points. How many points do I have left?
107
Correct answer: 108
109