Numeracy Foundation November 2020 Unit 1 Q6
6. Marium buys some blueberries and strawberries.
| Blueberries cost £4 per kg | Strawberries cost £3.60 per kg |
Marium buys 1·5 kg of blueberries.
She receives £6.80 change from a £20 note.
Calculate the mass of the strawberries that Marium buys. [5]
| Scheme | Marks | Comments |
|---|---|---|
| (Cost of strawberries) 20 – 6.8(0) − 1.5 × 4 (£) 7.2(0) | M2 A1 | M1 for (Blueberries cost) 1.5 × 4 ( =6) Award M2, A1 for appropriate sight of (£)7.2(0) irrespective of any further inappropriate working |
| (Mass of strawberries) (20 – 6.8(0) − 1.5 × 4) ÷ 3.6 or 7.2(0) ÷ 3.6 | M1 | In FT allow sight of 14.2(0) as indication of 20 – 6.8(0) attempted Allow convincing appropriate repeated addition FT provided there has been an attempt at a subtraction of the cost of blueberries from 20 – 6.8(0) (=13.2(0)), 20 or 6.8(0) and provided M1 previously awarded, e.g.
FT (20 – 6.8(0) – ‘their cost of blueberries’) ÷ 3.6 provided ‘their cost of blueberries’ > (£)4 |
| 2 (kg) | A1 | CAO. Must be from correct working If no marks, award SC1 for an answer of 3.6(6kg) or 3.67(kg) or 3.7(kg) (from (20 – 6.80) ÷ 3.6) An answer only of 2 kg is awarded all 5 marks (strictly provided no incorrect working seen - this is answer only). Any other answer only, such as ‘2 bags’, is awarded no marks. |