### Number Facts

There are 2 main types of number facts. There are the times tables, or multiplication facts, and the addition facts, of which the most important are the number bonds to 10 - the pairs of numbers that add up to 10.

#### Number bonds to 10

I regard the number bonds to 10 as the most important number facts. This is because they can be applied to so much more calculation.

The pairs are: 0 and 10, 1 and 9, 2 and 8, 3 and 7, 4 and 6, 5 and 5.

So 1 + 9 = 10, 9 + 1 = 10, 10 - 1 = 9 and 10 - 9 = 1.

Here is a video with ideas of how to learn the pairs to 10.

#### Learning the pairs to 10

Once you know the pairs to 10, apply them to pairs to 20 and pairs of 10 to 100.

We can calculate 11 + 9 = 20 (because 1 + 9 = 10) or 90 + 10 = 100.

### Time tables

As with the addition facts, knowing the times tables helps in many forms of calculation. There is a series of 3 videos looking at 3 aspects of learning and applying the times tables. The first 2 have now been published.

The first video looks at learning the tables by rote, with some useful ideas.

#### maths@home: learning the tables by rote

The second video looks at the patterns which help learn the times tables. Some of the resources suggested are available here.

#### maths@home looking at the patterns in the times tables

The third video looks at arrays, which show the relationship between multiplication and division.