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B1. Indices
Index notation

Vocabulary 5 × 5=5², or "5 squared". The 2 in 5² is called the index or power. When a number is written as powers of its factors, it said to be written in index form. 8=2 × 2 × 2=2³,or "2 cubed" and 27=3 × 3 × 3=3³, 64=4 × 4 × 4=4³ There are higher powers too, such as: 10 × 10 × 10 × 10=104 6 × 6 × 6 × 6 × 6=65 Any number to the power 0 is equal to 1, ie., n0=1

Use this display to check the value of xn for various values of x and n. You can either enter integer values between 0 and 10, or use the sliders.

Choose x: Choose n: Then xn=

Practice writing numbers in index notation. Press "Write" to get started:

in index notation: Coded:

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