Mathematical operation | Calculator button | Computer keyboard key |
+ | Shift and ‘=’ on the main keyboard or ‘+’ on the number pad | |
− | ‘−’ (the key to the left of ‘=’) on the main keyboard or on the number pad | |
× | Shift and ‘8’ on the main keyboard or ‘*’ on the number pad | |
÷ | ‘/’ on the main keyboard or on the number pad | |
= | Enter | |
Clear | Backspace (as often as needed to clear all entries) |
Across | Down |
1. 21 × 47 | 1. 19 × 5 |
4. 1788 ÷ 6 | 2. 8003 × 9 |
6. 497 – 105 + 12 | 3. 1234 – 1216 |
7. 1458 ÷ 3 × 2 | 5. 1 + 11 + 111 – 29 |
9. 32 + 681 – 13 | 6. 517 ÷ 11 |
7. 21 × 33 ÷ 7 | |
8. 49 + 49 – 48 |
Motorbikes | Cars | Total number of wheels | |
10 | 11 | 10 × 2 + 11 × 4 = 64 | (too many wheels → need fewer cars) |
12 | 9 | 12 × 2 + 9 × 4 = 60 | (too many wheels → need fewer cars) |
14 | 7 | 14 × 2 + 7 × 4 = 56 | (too many wheels → need fewer cars) |
15 | 6 | 15 × 2 + 6 × 4 = 54 | This matches with what Paul told you. |
Mathematical operation | Calculator button |
Exponent |
I know: | I want: |
---|---|
The attic is approximately 825 cm by 900 cm. | To find the cheaper option |
Each joist is 5 cm wide. | |
There are 17 joists. | |
The insulation fits perfectly between the joists. | |
A £200 grant is available. | |
The cheapest quote from a contractor is £650 | |
The insulation comes in rolls that are 40 cm wide and 800 cm long. | |
Each roll costs £15 but there is a special 3 for 2 offer at the moment. | |
I need safety glasses, a face mask and gloves costing £40 to install the insulation. |
Three-quarters of people in Wales believe wind farms are necessary, says new poll. (BWEA, 2005)
Mathematical operation | Calculator button | Keyboard key |
---|---|---|
Negative number | The − (minus) key |
Calculation | Answer | Calculation | Answer | |
---|---|---|---|---|
2 × 4 | 2 × (–4) | |||
1 × 4 | 1 × (–4) | |||
0 × 4 | 0 × (–4) | |||
(–1) × 4 | (–1) × (–4) | |||
(–2) × 4 | (–2) × (–4) | |||
(–3) × 4 | (–3) × (–4) |
Calculation | Answer | Calculation | Answer | |
---|---|---|---|---|
2 × 4 | 8 | 2× (–4) | –8 | |
1 × 4 | 4 | 1 × (–4) | –4 | |
0 × 4 | 0 | 0 × (–4) | 0 | |
(–1) × 4 | –4 | (–1) × (–4) | 4 | |
(–2) × 4 | –8 | (–2) × (–4) | 8 | |
(–3) × 4 | –12 | (–3) × (–4) | 12 |
Hole number | Player 1 | Player 2 |
---|---|---|
1 | –1 | –2 |
2 | –2 | –2 |
3 | –1 | –3 |
4 | –1 | 0 |
5 | –2 | –1 |
6 | –3 | –2 |
7 | 0 | 0 |
8 | –2 | –1 |
9 | –2 | –1 |
(–1)^{2} | _ | (–2)^{2} | _ |
(–1)^{3} | _ | (–2)^{3} | _ |
(–1)^{4} | _ | (–2)^{4} | _ |
(–1)^{5} | _ | (–2)^{5} | _ |
(–1)^{6} | _ | (–2)^{6} | _ |
(–1)^{2} | 1 | (–2)^{2} | 4 |
(–1)^{3} | –1 | (–2)^{3} | –8 |
(–1)^{4} | 1 | (–2)^{4} | 16 |
(–1)^{5} | –1 | (–2)^{5} | –32 |
(–1)^{6} | 1 | (–2)^{6} | 64 |