No, it is not necessary. But it does help to be tidy.
Chat with our AI personalities
you only line the decimals up when you are subtracting or adding not when you are multiplying im not sure about division...
no
Fractions and decimals are usually rational numbers. Besides, multiplying rational and irrational numbers is also similar.
Adding and subtracting decimals is easy. When you put the numbers one above the other, line up the decimals vertically and treat as you would any whole number just keep the decimals in line and bring it straight down to your answer.
they aren't that different but the whole number needs to be converted for them to be the same