# Order of operations and arrays

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## Lesson details

### Key learning points

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

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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?

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?

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

Q4.

Answer the following: 18 x 3 - 5 x 2

50

98

Q5.

Answer the following: 18 x (8 - 6) x 2

48

80

### 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

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