| 1. | Then, if there is a carry digit, add it to this sum.
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| 2. | Add the two hundreds-digits, and to their sum add the carry digit if there is one.
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| 3. | In the addition algorithm the tens-digit of the sum of a pair of digits is called the " carry digit ".
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| 4. | In the multiplication algorithm the tens-digit of the product of a pair of digits is called the " carry digit ".
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| 5. | If the multiplicand does not have a hundreds-digit then if there is no carry digit then the multiplication algorithm has finished.
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| 6. | If none of the two numbers has a hundreds-digit then if there is no carry digit then the addition algorithm has finished.
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| 7. | The sum of six and two is eight, but there is a carry digit, which added to eight is equal to nine.
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| 8. | Then, if there is a carry digit ( superscripted, under the line and in the tens-column ), add it to this product.
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| 9. | The tens-column so far contains only one digit : the tens-digit of the multiplicand ( though it might contain a carry digit under the line ).
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| 10. | If there is a carry digit ( carried over from the tens-column ) then write it in the hundreds-column under the line, and the algorithm is finished.
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