Question

Use the rules for multiplication by powers 100 to calculate 20 x 100

Answer 1

Multiplication by a power of 10 requires only that you add the number of zeros indicated by the power. Multiplying by 100 = 10² will add 2 zeros on the right.

... 20 × 100 = 2000

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Multiplying by 10⁰ will add 0 zeros on the right.

... 20 × 10⁰ = 20