powers are exponents.
ten to the zero power=100=1
ten to the first power=101=10
ten to the second power=102=100
etc.
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Some people use their math powers for good; but I use mine for the forces of evil! They come in handy when facing a numerologist in a duel.
To multiply powers with the same base, you add the exponents. For example, 10^2 x 10^3 = 10^5. Similarly, to divide powers with the same base, you subtract the exponents. For example, 10^3 / 10^5 = 10^(-2).
10 cubed is equal to 1,000.
81.402 in expanded form using the powers of ten = (8 x 10^1) + (1 x 10^0) + (4/10^1) + (0/10^2) + (2/10^3)
2x10^6