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When adding or subtracting decimals how many digits should the answer contain?
as many as needed to satisfy the accuracy needed.
How do you multiply a mixed decimals?
Multiplying mixed decimals is almost just like multiplying whole numbers.For example:5.21 * 1.1You multiply these two numbers as if they didn't have decimal points, and you get 5,731; however, don't forget that you have decimals!Count the total number of digits after the decimal in each factor. You should get 3 since 5.21 has two digits after the decimal, and 1.1 has one digit after the decimal. 2 + 1 = 3Since you have 3 for that total, take the product (which is 5,731) and move the decimal point of that 3 spaces to the left.Your final product is 5.731:]
Which is larger 0.125 or 0.25?
0.25 is larger than 0.125 because it has the larger digit in the tenths place. You can easily compare decimals with different numbers of digits by putting zeroes to the right of the decimal with less digits until they match. For example, 0.25 is the same as 0.250. It should be pretty obvious which is bigger between 0.250 and 0.125.
How many 3 digit numbers can be written with the digits 01357 if repetition is permitted and the numbers should be multiples of five?
there are five choices for each position, so 5^3 or 125 numbers.
When multiplying or dividing two numbers how many significant figures should there be in the answer?
The basic idea is that the final result should not be - or rather, appear to be - more accurate than the original numbers. Therefore, the final result should not have more significant digits than the original numbers you multiply or divide. For example, if one factor has 3 significant digits, and the other 5, round the final result to 3 significant digits.
