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Example II.—16 multiplied by 14:
| 16 | 14 and 6 are 20, join an 0, is | 200 | |
| 14 | 4 times 6 are | 24 | |
| 224 | Added are | 224 |
Example III.—19 multiplied by 17:
| 19 | 17 + 9 = 26, Join an 0 = 260 | |
| 17 | 7 × 9 = 63 + 260 = 323 | |
| 323 |
Another mode of multiplying the same or similar figures, is given in these two following examples, which method is less useful than the former one, as it only extends to figures under 20: Example IV.
| 18 | Multiply the unit 8 by the unit 5 makes 40, put down an 0, and carry 4, which added to the units 5 and 8, make 17; put down 7, and carry 1 to the 1 of 16 is 2, in all 270. | |
| 15 | ||
| 270 |
| 17 | 7 x 6 = 12, put down 2 and carry 4. | |
| 16 | 4 + 6 + 7 = 17 put down 7, and carry 1. | |
| 272 | 1 + 1 = 2, joined to 7 and 2 = 272 |
To multiply figures that are between 20 and 100, a little modification, or rather a fuller explanation of the first rule is requisite.
As in that method; so must the multiplier of any sum above 20, be added to the unit figure of the multiplicand; but then the result must be multiplied by the figure which is in the tens place, or left-hand figure of the multiplicand; afterwards proceed as in the first examples; as 28 times 22 will evince.
