Q: Do decimal points need to be lined up when adding and subtracting decimals?

Write your answer...

Submit

Still have questions?

Continue Learning about Math & Arithmetic

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

This is effectively the same as lining up the decimal points when adding or subtracting ordinary decimal fractions.

It's a good idea.

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.

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.

Related questions

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

Write them one above the other with the decimal points aligned.

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.

This is effectively the same as lining up the decimal points when adding or subtracting ordinary decimal fractions.

Yes, When Adding and Subtracting decimals you should line up the decimals. You need to keep each place value in the same column, the same as when you add whole numbers you keep the ones column lined up, same for the tens, etc. Lining up the decimal points makes sure that the tenths column is kept together, same for the hundredths, and so on.

It's a good idea.

When adding numbers with decimals always make sure the decimal points are lined up. That is the only way to be sure that the person will be adding them up right.

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.

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.

Adding whole numbers is the addition of decimals where the decimal part is zero; in both cases the digits are place value aligned meaning that the decimal points, which lies between the units (or ones) and tenths columns, are aligned - in the whole number the decimal point is "hiding" at the end.

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.

Possibly, as decimals can't be decimals without decimal points.