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 3 cm 3cm 3cm 3cm
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
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
Your turn Answer question page 25 Exercise 3.1 1,2,3 and 4
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
Your turn Exercise 3.2 Question 1-8 a,c,e only Question 9 Question 12 and 14 Page 28 Challenge
Key ideas The cube of a number is the number multiplied 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