Adding and subtracting decimals
Adding or subtracting two numbers is simpler in decimal notation than in fractional notation.
- Write the numbers so that they have the same number of decimal places (putting 0 on the right if needed).
- Add the numbers in the usual manner, ignoring the decimal point (from right to left).
- Put back the decimal point at the same position from the right.
Multiplication and division are complex. We normally use a calculator for long multiplication and division methods.