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20 = XX
0.20
To write powers of a number you write the number, followed by the number of the power in superscript. For example, a number to the second power is x2, a number to the third power is x3 and so on. Squaring is taking a number to the second power. Thus 20 squared is 202, which equals 400.
20/1000 0.020
To write the fraction 20/5 as a whole number, you need to perform the division operation. In this case, 20 divided by 5 equals 4. Therefore, the fraction 20/5 can be written as the whole number 4.