Learning to estimate products is very helpful because it helps with teach you how to learn how to do your taxes and etc.
Estimating will give an indication of the order of magnitude of the answer. The decimal point determines the order of magnitude.
Estimating the number 684.575 to one decimal place gives you 684.6 which is very close.
Ex: 52.73 x 384.12 Round to 50 x 400 = 20,000 so when you do the actual math you know that there are 5 places to the left of the decimal.
If I understand your question correctly - the answer you're looking for is 8.19
The estimated answer for 308 would be 300. When estimating, you round the number to the nearest place value you are estimating for. In this case, we are estimating to the nearest hundred, so we look at the hundreds place digit (3) and drop the tens and ones digits. Therefore, the estimated answer for 308 is 300.
If you have no clue about how decimals work then getting an estimate for the answer gives you an order of magnitude which can help in placing the decimal. But if you are even a bit clued up, estimating will not be necessary.
By estimating the product it gives an indication of how big the final answer should be; knowing this, the decimal point can be put in to give an answer of the correct size. For example if the product estimate is 125 and the actual answer (without the decimal point) is 136728, then the decimal point needs to be inserted to make the answer about 125; the place is therefore after the 136, making the answer 136.728 (= 5.4 x 25.32 ≈ 5 x 25 = 125)
Estimating quotients gives an indication of the order of magnitude of the answer. That is, whether the answer is in units, or tens, or hundreds, thousands and so forth. Basic understanding of the placement of the decimal point should then be a trivial exercise.
Estimating will give an indication of the order of magnitude of the answer. The decimal point determines the order of magnitude.
Estimating the number 684.575 to one decimal place gives you 684.6 which is very close.
Learning to estimate products is very helpful because it helps with teach you how to learn how to do your taxes and etc.
Ex: 52.73 x 384.12 Round to 50 x 400 = 20,000 so when you do the actual math you know that there are 5 places to the left of the decimal.
If I understand your question correctly - the answer you're looking for is 8.19
Estimating help determine the order of magnitude of the answer. It is, therefore, a simple matter to place the decimal point is such a way that the order of magnitude of the calculated answer matches that of the estimate.
decimal place
hundredths place in a decimal is at the second place at the right of the decimal point.
The second decimal place to the right of the decimal point is called the hundredths place