Mathematics / Year 9 / Number and Algebra / Real numbers

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Curriculum content descriptions

Express numbers in scientific notation (ACMNA210)

  • representing extremely large and small numbers in scientific notation, and numbers expressed in scientific notation as whole numbers or decimals
General capabilities
  • Numeracy Numeracy
ScOT terms

Scientific notation

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Year level 9-10
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Learning area Mathematics
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Graham's number

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 ...

Teacher resource

Very large and very small numbers

This is a website designed for both teachers and students, which addresses very large and very small numbers from the Australian Curriculum for year 9 students. It contains material on the vocabulary and notation for dealing with very large and very small numbers using scientific notation. There are pages for both teachers ...

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An easy way to write huge and microscopic numbers

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.

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Sachets of sugar and scientific notation

How many grains of sugar are there in 52 sachets? Got a few days spare? Instead, see how to work this out and express the answer using scientific notation.

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Calculations involving scientific notation

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.

Teacher resource

Scientific notation

This is a website designed for both teachers and students that addresses scientific notation from the Australian Curriculum for year 9 students. It contains material on scientific notation using index laws and multiplication, division and indices. There are pages for both teachers and students. The student pages contain ...

Interactive resource

Exploring exponents and scientific notation

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.

Teacher resource

TIMES Module 22: Measurement and Geometry: scale drawings and similarity - teacher guide

This is a 41-page guide for teachers. It contains an introduction to scale drawings and similarity, and in particular the tests for triangles to be considered similar. Applications of similarity are included throughout the module.

Teacher resource

TIMES Module 31: Number and Algebra: indices and logarithms - teacher guide

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