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When adding or subtracting decimals how can you be sure to add or subtract only digits that have the same place value?
The simplest way is to line up the numbers so that their decimal points are aligned, and corresponding digits are also aligned according to their place value.
Why is it important to line up the decimal points when adding or subtracting but not when multiplying?
Because when adding or subtracting, the operations must take account of the place values of individual digits in the numbers. When multiplying, only the overall order of magnitudes are relevant for placing the decimal point in the product.
How do you turn a division into a decimal fraction?
You do a long division, adding decimal digits until you get a remainder of zero (terminating decimal) or a repeating pattern of decimal digits.
How do you estimate using front-end estimation?
by adding or subtracting the values of the digits in the front place
How can you round to the hundredths place if there are 2 digits in the decimal?
The only way to do this is by adding a zero after the 2 digit in the decimal.
How do you do subtracting fractions with regrouping?
You do by subtracting one from the previous number and adding 10 to the top number of the digits you are regrouping. Subtract those two digits and you should get your answer.
When adding and subtracting decimalshow can you be sure to add or subtract only digits that have the same place value?
You line the number up, vertically, so that the decimal points are one below the other.
When adding or subtracting decimals how can you be sure to add or subtract only digits that have the same place value?
The simplest way is to line up the numbers so that their decimal points are aligned, and corresponding digits are also aligned according to their place value.
Why is it important to line up the decimal points when adding or subtracting but not when multiplying?
Because when adding or subtracting, the operations must take account of the place values of individual digits in the numbers. When multiplying, only the overall order of magnitudes are relevant for placing the decimal point in the product.
How do you turn a division into a decimal fraction?
You do a long division, adding decimal digits until you get a remainder of zero (terminating decimal) or a repeating pattern of decimal digits.
How do you estimate using front-end estimation?
by adding or subtracting the values of the digits in the front place
What must each number have when adding and subtracting scientific numbers?
same number of significant digits
When adding or subtracting decimals how many digits should the answer contain?
as many as needed to satisfy the accuracy needed.
When adding or subtracting measured quantities what determines the number of decimal places?
I presume this is a question about scientific arithmetic. When adding or subtracting two numbers, with a different number of decimal places, the quantity with the least number of decimal places determines the number of decimal places in the answer. For example, let's say you are adding two masses: .1 grams .11 grams .1grams + .11grams = .21 grams Because .1 only has one decimal place, the answer becomes .2 grams, and we ignore the .01 because it is lost due to a lack of precision. The process of multiplying and dividing is different, as you compare significant digits instead of decimal places instead.
When you add or subtract what is the rule for determining the number of significant figures in the answer?
When adding or subtracting numbers, the result should have the same number of decimal places as the least number of decimal places in the original numbers. This is because in these operations, you are limited by the least precise measurement. Significance figures don't matter in addition or subtraction, only decimal places.
How can you round to the hundredths place if there are 2 digits in the decimal?
The only way to do this is by adding a zero after the 2 digit in the decimal.
9.75 in fraction?
9.75 is a fraction. It is a fraction in decimal form rather than in the form of a ratio. However, that does not stop it being a fraction. Its rational equivalent is 9 75/100 which can be simplified, but if adding (or subtracting) other decimal numbers with two digits, you may prefer to delay simplification.
