Extended tables
You learn the 11, 12, 20, 25 and 50 times tables from a times table you already know.
How to work it out
- Multiply by 11 or 12: do times 10 and add the rest.
- Multiply by 20: do times 2 and add a 0.
- Multiply by 50: do times 100 and halve it.
- Multiply by 25: do times 100 and halve twice.
11 × 7
- Times 11 is times 10 plus one more group.
- Do 10 × 7 = 70.
- Add one more 7: 70 + 7 = 77.
- So 11 × 7 = 77.
More examples
20 × 7
- Do 2 × 7 = 14.
- Put a 0 on the end: 140.
2 × 7 = 1420 × 7 = 140
25 × 8
- Do 100 × 8 = 800.
- Halve it: 800 ÷ 2 = 400.
- Halve it again: 400 ÷ 2 = 200.
12 × 6
- Do 10 × 6 = 60.
- Do 2 × 6 = 12.
- Add them: 60 + 12 = 72.