Squares, roots and powers
You learn to square numbers and find square roots.
How to work it out
- A square (like 7²) is a number times itself: 7 × 7.
- The square root (√49) is exactly the opposite: which number times itself is 49?
7²
- The little 2 above the number means square.
- Multiply the number by itself.
- Work out: 7 × 7 = 49.
- The answer is 49.
More examples
√64
- The square root sign asks: which number times itself is 64? Think of the times tables: 8 × 8 = 64.
- So √64 = 8.
1? × ? = 6428 × 8 = 64, dus √64 = 8
3³
- A third power is multiplying by itself three times.
- Work out: 3 × 3 × 3 = 27.
- The answer is 27.