Adding machines are similar to calculators in use. However, adding machines provide more functions when calculating numbers. Adding machines are used by many individuals and businesses; the financial industry is a particularly heavy user of them. Most of these machines include printing tape to record all the numbers calculated. This provides a paper record for double-checking work. Adding machines also have special memory capabilities, so users do not always need to press the function keys when calculating numbers.

## Step 1

Load printing tape into the adding machine. Most machines let the user decide whether to use the tape.

## Step 2

Enter numbers into the machine.

## Step 3

Press the "+" key to add more numbers to the original figure.

## Step 4

Press the "Total" or "*" to compute the final figure.

## Step 5

Review the tape to look for any errors in the final total.

## Step 6

Press the "Clear" key to erase the figure and add a different set of numbers.

#### Tip

Ten-key skills--similar to keyboard typing skills--can help users of adding machines quickly and accurately calculate large groups of figures.

#### Things You'll Need

Adding machine

Printing tapes

#### Warning

Most adding machines must be plugged into a wall outlet. This makes them less mobile than hand-held calculators.