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When subtracting or adding numbers in scientific notation why do the exponents need to be the same?
This is effectively the same as lining up the decimal points when adding or subtracting ordinary decimal fractions.
When do you need to write zero as a placeholder when adding and subtracting decimals?
Adding decimal same as adding whole numbers
When adding or subtracting decimals the decimal point must be in line for all numbers?
Yes.
Why it is important to line up decimal numbers by their play value when you add or subtract them?
This is true for adding and subtracting ALL numbers, not just decimal representations.
What happens to the decimal in adding and subtracting decimals?
When you are adding and subtracting decimals, youare +/- ing the whole numbers and tenths in the number. the decimal might go away ex: 1.3-0.3=1 or it won't ex: 1.9-0.3=1.6
When subtracting or adding numbers in scientific notation why do the exponents need to be the same?
This is effectively the same as lining up the decimal points when adding or subtracting ordinary decimal fractions.
When do you need to write zero as a placeholder when adding and subtracting decimals?
Adding decimal same as adding whole numbers
When adding or subtracting decimals the decimal point must be in line for all numbers?
Yes.
Why is it important to align decimal point when adding or subtracting decimal numbers?
Because if you dont , your answer will be a whole number and that will make your answer wrong
Why it is important to line up decimal numbers by their play value when you add or subtract them?
This is true for adding and subtracting ALL numbers, not just decimal representations.
How is adding and subtracting decimals similar to and different from adding and subtracting whole numbers?
You write down the numbers you want to add and subtract, making sure the decimal points are aligned. Then, you add (or subtract) EXACTLY as you would add or subtract integers. The decimal point in the solution should be aligned with the decimal points in the original numbers.
What happens to the decimal in adding and subtracting decimals?
When you are adding and subtracting decimals, youare +/- ing the whole numbers and tenths in the number. the decimal might go away ex: 1.3-0.3=1 or it won't ex: 1.9-0.3=1.6
What is the definition of adding and subtracting integers?
adding and subtracting integers is when you add and minus 2 numbers
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.
What is the rule for significant figures when adding or subtracting decimals?
When adding and/or subtracting, your answer can only show as many decimal places as the measurement having the fewest number in the decimal places.
How are subtracting and adding related?
use numbers
Why is it helpful to estimate the answer before adding or subtracting decimals?
It can be helpful for people who do not have a clue where the decimal point should go in the answer. For those who do know, the exercise is pointless.
