Year 5

Year 5

# Using and explaining addition strategies

## Lesson details

### Key learning points

1. In this lesson, we will be learning how to use different addition strategies (e.g. partitioning, commutativity and rounding and adjusting) in order to solve magic squares.

### 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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## Exit quiz

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### 5 Questions

Q1.
1. Complete the following equation using your knowledge of number bonds: 74 + _____ = 100
13
2
36
Q2.
2. Use the partitioning strategy to solve the following equation: 34 + 13 =
36
37
46
Q3.
What is the law of commutativity?
A rule which helps us to add by using the column method at all times.
A rule which states that addition and subtraction are the opposite of each other.
Correct answer: A rule which states that you can swap the numbers in an addition/multiplication equation and your answer will remain the same.
A rule which suggests that we should always check our answers using the inverse method.
Q4.
4. Use the round and adjust strategy to solve: 71 + 16 =
78
81
86