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00:13:00

#### Estimation – Educated Guesswork?

How can we make sensible estimates of very large numbers? It is often very important to know the size of an unknown number, at least to within a factor of ten.

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00:05:00

#### Square Roots 2

00:11:00

#### All numbers are not equal

An introduction to the various types of numbers which are recognised as important.

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00:12:00

#### Fractions 2

An approach to adding and subtracting fractions, using an understanding of the processes involved.

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00:21:00

#### Fractions 1

How can we represent fractions in the simplest way? Equivalence of decimal and common fractions.

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00:15:00

#### Percentages

Making life easy when using percentages. A sometimes fraught topic looked at differently.

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00:10:00