Decimals are estimated by rounding off the decimal places to the nearest tenths,hundredths,thousandths,ten thousandths,etc.
Yes decimals are used in probability; also percent and odds.
12/25this is because you shouldn't have decimals on the numerator
The estimate for 15,772 is 10,000
It is an estimate that is quite safe
An upper bound estimate is a estimate that is greater than the actual solution.
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
I think you round it to the nearest whole number...
1.0 and 0.5
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.
terminating decimals and repeating decimals
by estimating the number after the decimal
The same way as whole numbers. 0.3865 + 0.2274 could be estimated as 0.40 + 0.20 = 0.6
round down till there is not a decimal. example: 4.4*5.6 round to 4*5= about 20 (lower estimate)