Foundation June 2018 Paper 2 Q9
9 In this question, use
1 foot = 12 inches
1 inch = 2.5 centimetres
Change 5 feet 8 inches to centimetres. [3 marks]
| Answer | Mark | Comments |
|---|---|---|
| Alternative method 1 | ||
| \(5 \times 12 \times 2.5\) or 150 or \(8 \times 2.5\) or 20 | M1 | oe eg \(2.5 + 2.5 + 2.5 + 2.5 + 2.5 + 2.5 + 2.5 + 2.5\) |
| \(5 \times 12 \times 2.5 + 8 \times 2.5\) or \(150 + 20\) | M1dep | |
| 170 | A1 | |
| Alternative method 2 | ||
| \(5 \times 12 + 8\) or 68 | M1 | |
| their \(68 \times 2.5\) | M1dep | |
| 170 | A1 | |
| Alternative method 3 | ||
| [5.66, 5.67] \(\times 12\) or [67.92, 68.04] or [5.66, 5.67] \(\times 2.5\) or [14.15, 14.175] | M1 | oe |
| [5.66, 5.67] \(\times 12 \times 2.5\) or [169.8, 170.1] | M1dep | oe |
| 170 | A1 | |
Additional guidance
| Use of 5.8 is an incorrect method eg \(5.8 \times 12 = 69.6\) and \(69.6 \times 2.5 = 174\) | M0M0A0 |