TO ADD OR SUBTRACT DECIMALS:

1) Line up the decimal points vertically. Fill in any 0’s where necessary. 2) Add or subtract the numbers as if they were whole numbers. 3) Place the decimal point in the sum or difference so that it lines up vertically with the numbers being added or subtracted.

What are the rules of decimals?

Line up your numbers with the last digits under each other. Multiply as you would with whole numbers. Add the decimal places in each of the numbers being multiplied. Move the decimal point to the left the TOTAL number of places in the numbers being multiplied.

Do you have to line up decimals when adding?

In order to keep the numbers in the proper place-value column when adding decimals, align the decimal points. This will keep the numbers aligned; ones to ones, tenths to tenths, hundredths to hundredths, and so on.

When adding decimal numbers where do we start?

Steps to Add or Subtract Decimals

Write the decimals one below the other as per the places of the digits. Add or subtract starting from the rightmost digit and moving towards the leftmost digit. Place the decimal point under the decimal point in the answer.

What is the first step in adding or subtracting decimals?

Step 1: Line up the numbers vertically so that the decimal points all lie on a vertical line. Step 2: Add extra zeros to the right of the number so that each number has the same number of digits to the right of the decimal place. Step 3: Subtract the numbers as you would whole numbers.