Education > Complete treatise on practical arithmetic and book-keeping

APPENDIX.
239
COMPOUND MULTIPLICATION.
Rule /.
When ihe multiplier is below 12, begin at the lowest place,
id carry according to the value of the higher.
Rule II.
LWhen the multiplier is a composite number, multiply sue-
.sively, by its component parts.
Mult. £23 11 by 56. Prod. £1320 19 2.
£38 13 7^ by 132. _ £5106 1 3.
• Rule III.
When the multiplier is not composite, multiply by fhe near-
st composite number, and by the difference ; and add the
noducts when the composite number is less than the given
lumber, otherwise, subtract them.
Mult. £13 16 7± by 51. Prod. £705 7 10|.
£27 19 9* by 59. £1651 8 ll£.
Rule IV.
When the multiplier is a large number, multiply as many
imes by 10, as there are figures in the multiplier above the
mit’s place ; then multiply the given multiplicand by the
mil’s figure, the first product by the ten’s place, the second
jy the hundreds, and so on; then add the products.
Multiply £3 11 9^ by 7386
£3 11 9^X6= - 21 10 9
10
35 17 11 X8= - 287 3 ,4.
10
358 19 2 X3= - 1076 17 6
10
3589 11 8 X7= 25127 1 8
£26512 13 3
Mult. £4. 9 lOfby 975. Prod. £4382 8 5f.
Mult. Cwt 13 3 17 by 193. Prod. Cwt.
Abundance of examples on these rules will be fouad in
Compound Multiplication, and the first rule of practice.