Foundation November 2021 Paper 1 Q15
15 Here is a calculation.
| \(31 \times 84 = 2604\) |
You can use the calculation to help answer the following questions.
(a) Work out \(\quad 2604 \div 84\) [1 mark]
(b) Work out \(\quad 3.1 \times 8.4\) [1 mark]
(c) Work out \(\quad 31 \times 85\) [2 marks]
| Answer | Mark | Comments |
|---|---|---|
| 31 | B1 |
| Answer | Mark | Comments |
|---|---|---|
| 26.04 | B1 |
| Answer | Mark | Comments |
|---|---|---|
| 2604 + 31 or Valid attempt to multiply 31 by 85 | M1 | from traditional method their 155 + their 2480 or their 85 + their 2550 at least one correct and placeholder of zero correct or implied from grid method their 2400 + their 150 + their 80 + their 5 (at least three correct) from Chinese / Napier’s bones method at least three values correct from 2/4, 1/5, (0)/8 and (0)/5 and total calculated for each diagonal with at least one carrying figure placed correctly |
| 2635 | A1 |