 Home > College of Sciences > Institute of Fundamental Sciences > Maths First > Online Maths Help > Arithmetic > Decimals > Decimal Arithmetic > Multiplication SEARCH MASSEY  # Decimal Arithmetic

## Multiplication

Two decimal numbers may be multiplied as follows:

• the numbers are written one below the other with the rightmost digit aligned
• starting on the right, multiply each digit in the top number by each digit in the bottom number, just as with whole numbers (ignore the decimal points)
• add the products
• place the decimal point in the answer by starting at the right and moving a number of places equal to the sum of the decimal places in both numbers multiplied

### Example 3A.

Let us calculate:  ### Example 3B.

Each time you click "New Example" a new example will be shown. Click "=" to see the answer.

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### Exercise 3.

Perform the following multiplication without using a calculator:

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