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It is difficult to answer the question because, for addition or subtraction, it is often easier to obtain the exact answer! If you line up the decimal points and then follow the rules of addition or subtraction - exactly as they would apply to whole numbers - you will get the correct answer!

Estimation may be useful to check your answer if you are poor at addition or subtraction of integers. But, if that is the case, your estimate is equally likely to be wrong!

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Q: How is estimation helpful when adding and subtracting decimals?

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3rd. Adding Decimals 5th - Adding and subtracting 6th - Dividing Decimals

Yes l

as many as needed to satisfy the accuracy needed.

line up the decimal point when your adding and subtracting. add annex a zero when you have extra number. sometimes you can use a number line.

you only line the decimals up when you are subtracting or adding not when you are multiplying im not sure about division...

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3rd. Adding Decimals 5th - Adding and subtracting 6th - Dividing 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.

Yes

adding subtracting multiplying and dividing

add them or subtract them, as appropriate!

Adding decimal same as adding whole numbers

They aren't. The rules are the same as those for adding/subtracting or multiplying integers. Just be careful of the decimal point's location.

by adding or subtracting the values of the digits in the front place

First you write the decimals one under the other, in such as way that the decimal points are aligned.

Mostly geometry, adding, subtracting fractions and decimals.

Yes.

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.

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