Answer:Adding and subtracting decimals is not too different from adding and subtracting any numbers. It is critical that you write your decimals so that the decimal points align, or you will find yourself adding tenths to ones or subtracting hundredths from tenths.
As long as each of the numbers you are adding or subtracting has the same number of decimal places, the addition or subtraction is fairly easy.
When you multiply decimals, do not align the decimal points. Simply line up the numbers along the right hand side of the problem. Then multiply just as you would if the numbers were all whole numbers and add at the end. After that count how many decimal places the two factors have (start at the far right of each number) and then give the answer that total number of decimal places.
Step-by-step explanation:
