4MA0 Higher June 2014 Paper 3R Q1
1
(a) Complete the table to show each number written correct to 1 significant figure.
(2)
| Number | 42.37 | 58.92 | 21.04 |
|---|---|---|---|
| Number written correct to 1 significant figure |
(b) Use the approximations in part (a) to work out an estimate for the value of \[\dfrac{42.37 + 58.92}{21.04}\] Show clearly how you obtain your answer. (2)
| Scheme | Marks |
|---|---|
| 40, 60, 20 | B2 |
| (2) |
Notes
B2: Award B1 for any one correct.
Allow standard form, but not trailing zeros (40.0/40.00 etc)
| Scheme | Marks |
|---|---|
| \(\dfrac{\text{“}40\text{”} + \text{“}60\text{”}}{\text{“}20\text{”}} = \dfrac{100}{20}\) | M1 |
| 5 | A1 |
| (2) | |
| (4 marks) |
Notes
M1: For adding their 40 and 60 correctly (not 42.37 and 58.92) or for correct working with rounded figures.
A1: cao dep on M mark awarded above.
Working required in part (b): the correct answer alone does not imply a correct method.