Summary
Contents
The author focuses especially on weaknesses in numeracy often observed in adults, and in teacher-trainees in particular.
Check-up 17: Using the Memory on a Four-Function Calculator
Check-up 17: Using the Memory on a Four-Function Calculator
Pupils' marks in four pieces of coursework (A, B, C and D) are combined to give an overall mark by using the formula: (3A+ 2.5B+ 1.5C + 5D)/12. Use a four-function calculator with a memory facility to find the overall mark obtained by a pupil for whom A = 57, B = 69, C = 78 and D = 49. Give the result to one decimal place.
Discussion and Explanation of Check-up 17
Putting in lots of brackets to show what must be done first, we have to calculate [(3 × 57) + (2.5 × 69) + (1.5 ...