Foundation June 2025 Paper 1 Q14
14
(a) By rounding each number to 1 significant figure, estimate the value of\[1.98 \times 3.82 + 6.75^2\]
You must show your working. [3 marks]
(b) Is your answer to part (a) an overestimate or an underestimate?
Tick one box.
- Overestimate
- Underestimate
Give a reason for your answer. [1 mark]
| Answer | Mark | Comments |
|---|---|---|
| 2 or 4 or 7 or 49 | M1 | |
| 2 and 4 and 7 | M1 | accept 49 for 7 |
| 57 with 2 and 4 and 7 seen | A1 | accept 49 for 7 condone 60 with 2 and 4 and 7 seen |
Additional guidance
| Ignore multiplication and/or addition of the given numbers | |
| 57 from multiplication and addition of values other than 2, 4 and 7 | M0M0A0 |
| Answer | Mark | Comments |
|---|---|---|
| Overestimate and correct reason or Underestimate and used 1 and 3 and 6 in part (a) and correct reason | B1 | oe eg every number rounded up |
Additional guidance
| Every number (was over .5 so) had to be rounded up | B1 |
| I rounded them up | B1 |
| (All) the numbers were closer to the higher number | B1 |
| I rounded up | B0 |
| The number was bigger than the real answer | B0 |