# Order of operations and arrays

## Lesson details

### Key learning points

1. In this lesson, we will be looking at writing calculations whilst obeying the order of operations, using arrays.

### Licence

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## Video

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## Worksheet

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## Starter quiz

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### 5 Questions

Q1.
Which of the following calculations matches the statement: I start with 12 then I add 5 and then multiply by 5?
Correct answer: (12 + 5) x 5
12 + (5 x 5)
12 + 5 x 5
Q2.
Which of the following calculations matches the statement: I start with 12 then I add 5 and then multiply by 5 and take away 2?
Correct answer: (12 + 5) x 5 - 2
12 + (5 x 5) - 2
12 + 5 x 5 - 2
Q3.
Which of the following calculations matches the statement: I start with 12, I first multiply by 5 and then take away 2?
12 x (5 - 2)
12 - 2 x 5
Correct answer: 12 x 5 - 2
Q4.
Answer the following: 18 x 3 - 5 x 2
50
98
Q5.
Answer the following: 18 x (8 - 6) x 2
48
80

## Exit quiz

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### 5 Questions

Q1.
Answer the following: 18 x (5 - 3) + 7
45
94
Q2.
Answer the following: 15 - 5 x 2
10
20
Q3.
Answer the following: (18 - 7) x (2 + 5)
-33
27
Q4.
Which of the following statements matches the calculation 15 x (5 - 3)?
Add 3 to 5 then multiply by 15
Multiply 15 by 5 then subtract 3
Correct answer: Subtract 3 from 5 then multiply by 15
Q5.
Which of the following statements matches the calculation 15 x (5 - 3) + 3?
Add 3 to 5, then multiply by 15 and then add 3
Multiply 15 by 5, then subtract 3 and then add 3
Correct answer: Subtract 3 from 5, then multiply by 15 and then add 3