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Why is integers useful?
Integers are whole numbers without decimals or fractions which are useful because calculations are easier to work out.
Why do you use fractions in math and life why do you need them?
Fractions are a useful way of looking at the world. You can use them the same way you use percentages. If you were rolling a die, you could say you have a 1 in 6 chance of getting a three. That's a fraction: 1/6. It's the same thing as saying you have a 16.7% chance of rolling a three because 1/6 = 16.7%. Fractions give you perspective. Learning math makes you think more clearly; helps you organize your brain.
Why are percentages useful?
Since they are all based on a common denominator of 100, some people find them easier for comparing fractions.
When a fractions have the same size parts useful for adding fractions?
say you were adding 3 / 4 to 7 / 8, if you make the denominators (lower parts) the same its easier to add the fractions, so 3 / 4 = 6 / 8, then add to 7 / 8 = 13 / 8 = one and five eighths
Why should you multiply the divisor and the dividend by the same power of 10?
If you are a beginner and not comfortable doing divisions when either the numerator or particularly the denominator are decimal fractions, then it is useful to multiply them both by the same power of 10 to get rid of the decimal fractions.
