writing to explain explain why it is important to line up decimal numbers by their place value when you add or subtract them.

It is important to line up decimal numbers in their place value because it helps make the problem easier to solve and it makes less mistakes because you know the place value for each one.

It is important to line up decimals because you need to line it up for the correct place value.

It is important to line up the decimals so it makes the problem easier and you know the place value for each one

why is it important to line up decimal numbers

Because you have to add place values...

What does pie equal?

It is important to make sure the decimal point is in the correct spot because it will keep the numbers aligned; ones to ones, tenths to tenths, hundredths to hundredths, and so on. For example, 2.34+3.28 is 5.62 but without the decimal point, the sum would be 562. That's very confusing because the two numbers are nowhere close to each other. That's why making the decimal point in the correct spot is very important.

Line them up so that you don't add numbers with different values.

http://www.softschools.com/math/topics/adding_and_subtracting_decimals/

explain how it is important to line up decimals numbers by their place value when you add or subtract them

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