# Calculations with variables

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## Lesson details

### Key learning points

- In this lesson, we will look at writing calculations that include algebraic terms.

### 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.

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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

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

### 5 Questions

Q1.

Which calculation matches the statement: I think of a number. I multiply my number by 2 then I subtract 5. (In the below calculations, m represents the originally thought number.)

m - 5 x 2

m x (2 - 5)

Q2.

Which calculation matches the statement: I think of a number. I subtract 5 from my number then I multiply by 2. (In the below calculations, m represents the originally thought number.)

m - 5 x 2

m x (2 - 5)

Q3.

Which calculation matches the statement: I think of a number. I subtract 5 from my number then I multiply by 2. I then subtract subtract 6 and finally multiply by 3.

(m - 5 x 2 - 6) x 3

m - 5 x 2 - 6 x 3

Q4.

Which of the following values of m gives an answer between 50-60 for the following calculation? 5 x m - 3

10

13

9

Q5.

Which of the following values of m gives an answer between 30-35 for the following calculation? 5 x (m - 3)

12

13

8