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Checking Your Work with a Calculator

In this worksheet, students first try to work out the problem without a calculator, and then they work it through again using a calculator.

'Checking Your Work with a Calculator' worksheet

Key stage:  KS 3

Curriculum topic:  Number

Curriculum subtopic:  Use Four Operations for All Numbers

Difficulty level:  

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Worksheet Overview

QUESTION 1 of 10

In this worksheet, you must use a calculator to answer these questions.

 

Example

 

Work out £3.41 + 56p.  Give your answer in £s.

 

Answer

 

We must NOT work out 3.41 + 56 as one amount is in £s and the other in pence.

 

The answer is to be given in £s, so we change everything to pence.

 

56p is the same as £0.56

 

On the calculator, we add 3.41 + 0.56 = 3.97

 

The answer is £3.97.  

 

N.B. The answer is not 3.97 but £3.97

Make sure you put units in all the questions where either the question has them, or the questions asks for them.

Work out

£780 - £553

Work out

£492 - £28.70

Work out

£41.40 + £97.02

Work out

£90.08 - 63p

Give your answer in £s.

Work out

£7.67 + 45p

Give your answer in pence (include your units).

Work out

£2.27 + 96p

Give your answer in £s.

Work out

£9.51 + 9p 

Give your answer in £s.

Work out

£ 5.36 + £ 6.12

Work out

9.15 + 9.61

Work out

2.51 + 94.6

  • Question 1

Work out

£780 - £553

CORRECT ANSWER
£227
EDDIE SAYS
As these are the same units, we can just subtract them using an appropriate method
  • Question 2

Work out

£492 - £28.70

CORRECT ANSWER
£463.30
EDDIE SAYS
When you are doing this, don't forget to line up the values using place value
  • Question 3

Work out

£41.40 + £97.02

CORRECT ANSWER
£138.42
£ 138.42
EDDIE SAYS
These are the same units so we can just add them using normal addition Don't forget to put the pound sign in
  • Question 4

Work out

£90.08 - 63p

Give your answer in £s.

CORRECT ANSWER
£89.45
£ 89.45
EDDIE SAYS
One of these values is in pence and our question asks for pounds. You have to convert 63p into pounds. 63p = £0.63
  • Question 5

Work out

£7.67 + 45p

Give your answer in pence (include your units).

CORRECT ANSWER
812p
812 p
EDDIE SAYS
Our question asks for the answer to be in pence so we need to convert £7.67 into pence.
  • Question 6

Work out

£2.27 + 96p

Give your answer in £s.

CORRECT ANSWER
£3.23
£ 3.23
EDDIE SAYS
Our question asks for the answer in pounds, you have to change 96p into pounds. 96p = £0.96
  • Question 7

Work out

£9.51 + 9p 

Give your answer in £s.

CORRECT ANSWER
£9.60
£ 9.60
EDDIE SAYS
Our question asks for the answer in pounds, you have to change 9p into pounds. 9p = £0.09
  • Question 8

Work out

£ 5.36 + £ 6.12

CORRECT ANSWER
£11.48
£ 11.48
EDDIE SAYS
These values are in the same unit, we can simply add them.
  • Question 9

Work out

9.15 + 9.61

CORRECT ANSWER
18.76
EDDIE SAYS
These are just numbers, add them as normal
  • Question 10

Work out

2.51 + 94.6

CORRECT ANSWER
97.11
EDDIE SAYS
These are just two numbers, add them (make sure you line them up correctly)
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