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Index notation

Index notation. LO:-To understand and be able to use cubes of numbers, index notation and other integer powers. Squares and cubes. The square of a number is the number multiplied by itself. E.G 3 x 3 = 9 The cube of a number is that number multiplied by itself and then by itself again. 3cm.

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Index notation

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  1. Index notation LO:-To understand and be able to use cubes of numbers, index notation and other integer powers

  2. Squares and cubes • The square of a number is the number multiplied by itself. E.G 3 x 3 = 9 The cube of a number is that number multiplied by itself and then by itself again 3cm 3 cm 3cm 3cm 3cm

  3. Squares and cubes • A squared number is written 3 • A cubed number is written • Write in your books the squares of numbers 1-15 • The cubes of numbers 1-5 and 10

  4. Using index notation • 5x5=5² • 5x5x5=5³ • 5x5x5x5= • 5x5x5x5x5= • 5x5x5x5x5x5= • We have written the product as a power of 5. The power is often called the index. We say that numbers are written using index notation

  5. Your turn • Answer question page 25 Exercise 3.1 1,2,3 and 4

  6. Using your calculator • Work out these • 15³ • 6 to the power of 5 • Find the power button on your calculator it may look like this Λ

  7. Your turn • Exercise 3.2 • Question 1-8 a,c,e only • Question 9 • Question 12 and 14 • Page 28 Challenge

  8. Key ideas • The cube of a number is the numbermultiplied by itself and then by itself again. • Numbers can be written using index notation, for example 2³ means 2x2x2 • You can use the power button on your calculator to work out any power of any number

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