Quiz Operations with Decimals, Rounding

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Question:
36
___ =?
-2

Answers:

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If I am reading your question correctly, then this is simple division.

I am reading your question as 36 divided by -2 or 36 / -2

The answer to 36 / -2 is -18.

I hope this helps... --Sarah



Question: My question is:
10.440 rounded to the nearest thousandth.
would that be 10.4 or 10.44? Does it matter since 10.44 would round down to 10.4? I'm not quite sure what "thousandth" means.
Thanks

Answers:

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Remember this example:
0.123 is zero plus ONE TENTH, plus TWO HUNDREDTHS, plus THREE THOUSANDTH.
10.440 has zero in the thousandth digit and seroes afterwards, so, it is already rounded to the nearest thousandth.


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Question: My question is:
8.062 rounded to the nearest thousandth.
would that be 8.1?
Thanks

Answers:

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Actually, 8.062 is already rounded to the thousandth.
8.1 would be the rounded value to the nearest tenth.

The thousandths place after the decimal would be the third number to the right of the decimal. The number after it determines whether the number stays or gets rounded up. In this case, there is no number after the 2 at the end there. We understand that it's really a 0 - we just didn't write it. So, the 2 remains as itself.

The rule is, pick the decimal place. Examine the number in that decimal place. Ask yourself, will this number stay as it is or be rounded up? Look at the number immediately to the right of that number you had in mind. If that number to the right is 5 to 9, your number rounds up to the next highest integer. If it's 0 - 4, your number stays as it is.

The 0 in 8.062 is in the tenths place. So, if we want to round to the nearest tenth, we better be looking at that number 0 and find out whether it stays 0 or goes up to 1. The number immediately to the right of it is a 6. Since 6 is between 5 and 9 inclusive, that 0 rounds up to a 1. So you replace the 0 with a 1 and drop the remaining numbers. Now you got 8.1, which is 8.062 rounded to the nearest tenth.


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If it is to thousanth, the answer remains as the question. This is because 8.062 has three numbers after decimal point and that is thousandth already. Thanks


Question: My question is:
9.64 rounded to the nearest thousandth.
would that be 9.6?
Thanks

Answers:

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Round 9.64 to the nearest thousandth. You'll notice that there is no thousandth in this number. The number is 9 + 6 tenths + 4 hundredths + 0 thousandths.
You could write it as: 9.6400 and since the digit to the immediate right of the thousandth postion is less than 5 (in this case it is zero), then do not add 1 to the thousandth position. So the number remains as 9.64 and no rounding is required.




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