Mathematics / Year 9 / Number and Algebra / Real numbers

• TLF-IDM015447

If you were asked what the biggest number you can think of is, what would you say? Infinity? Well, what about the biggest finite number you can think of? Mathematician Ron Graham came across such a gigantic number in his research that, to capture its massive size, he and his colleagues needed to come up with new methods ...

• TLF-IDM018003

What's a handy way of writing really big or really small numbers, to make them easier to read, write and comprehend? See how scientific notation can be used. Find out whether you should use a positive or negative exponent (index) to write a large number.

• TLF-IDM018338

Have you seen numbers written in scientific notation, sometimes called standard form? It's a way to write really large or small numbers with a base 10 and an exponent (raised to a power). See how you can do some standard form calculations and apply the laws of indices.

• TLF-IDL6550

Examine a group of eight numbers expressed using scientific notation. Sort them into positive and negative numbers. Group them according to whether they are greater or less than -1, 0 and 1. Arrange the numbers within each group in ascending order.

• TLF-IDM009048

This is a 26-page guide for teachers. It extends the study of indices to rational indices and introduces logarithms.