Summary
Contents
The author focuses especially on weaknesses in numeracy often observed in adults, and in teacher-trainees in particular.
Check-up 15: Using a Four-Function Calculator, Precedence of Operators
Check-up 15: Using a Four-Function Calculator, Precedence of Operators
- On your calculator enter this calculation just as it is written, reading from left to right: 3 + 4 × 5 =…. Does your calculator give you the ‘right’ answer?
- There are 149 pupils from Key Stage 1, 344 pupils from Key Stage 2 and 34 adults, going on a school trip. To calculate how many 68-seater coaches are required, the headteacher enters on a calculator: 149 + 344 + 34 ÷ 68 =… Is this correct?
Answers to Check-up 15
- Your calculator may give the answer 35. Technically this is wrong. The correct answer is 23.
- If a scientific calculator is used, the answer obtained (494 ...