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Earn +20 ptsQ: Do decimal points need to be lined up when adding and subtracting decimals?
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When adding or subtracting decimals always do what?
First you write the decimals one under the other, in such as way that the decimal points are aligned.
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 adding decimals do the decimal points have to be lined up?
It's a good idea.
What are step in adding decimals?
Write the numbers in a column so that all the decimal points are one below the other. Put a decimal point in the answers underneath the coumn of decimal points. Then add the numbers ignoring the decimal points.
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.
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