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Q: How do you estimate decimals?

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Yes decimals are used in probability; also percent and odds.

12/25this is because you shouldn't have decimals on the numerator

It is an estimate that is quite safe

4,536 whole numbers or mixed numbers. 5,040 pure decimals.

Find a common number that you can divide both by, just like simplifying fractions. Say you have a ratio of 2:4. Both of those numbers are divisible by two, so if you divide both by two you get 1:2. Generally you want to have both numbers as whole numbers (i.e. no fractions or decimals) Find the GCF of the numbers and divide them both by it. If the GCF is 1, the ratio is in its simplest form. If the ratio is between two decimals, multiply them by whatever power of ten will eliminate the decimals. Then proceed with the GCF.

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In the same way as you estimate them for whole numbers.

to find a low estimate for the product of two decimals, round both factors

by estimating the number after the decimal

1.0 and 0.5

I think you round it to the nearest whole number...

7.8+31.39+6.95

Because some decimals are really long and hard to write down. Especially if they're not repeating ones. So people round them to be able to say them or write them.

0.235 * 0.6891 = 0.1619385 What's to estimate? The total decimal places in the multiplicands is the total in the answer.

Using an estimate ensures that the answer is about right. With decimals where the decimal point should go is difficult for a lot of people, so an estimate of the answer ensures that it is put in the right place.

Decimals are all ready decimals so how could you say to convert it back to decimal

terminating decimals and repeating decimals

The same way as whole numbers. 0.3865 + 0.2274 could be estimated as 0.40 + 0.20 = 0.6

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