Foundation June 2022 Paper 1 Q3
3 By rounding each number to the nearest 10, estimate the value of \(31 \times 18\) [3 marks]
| Answer | Mark | Comments |
|---|---|---|
| 30 | B1 | |
| 20 | B1 | |
| (30 and 20 and) 600 | B1ft | ft their 30 \(\times\) their 20 with B1B0 or B0B1 SC1 (\(31 \times 18 =\)) 558, answer 560 |
Additional guidance
| Answer 600 with no working | B1B1B1 |
| Answer 558 with neither 30 nor 20 seen | B0B0B0 |
| \(30 \times 18\) with answer 540 \(31 \times 20\) with answer 620 and answer 600 (ignore further work) \(31 \times 20\) with answer 600 | B1B0B1ft B0B1B1ft B0B1B0ft |