SUBTRACTION.
SUBTRACTION.
$ 24. When it is required to find the difference between two numbers of the same kind, the process is called Subtraction. The operation is the reverse of addition.
1. John has 7 oranges, and his sister but four; how many more has John than his sister?
Illustration..—We first inquire what number added to four will make seven. From addition we learn that 4 and 3 are 7; consequently, if four oranges be taken from 7 oranges, 3 oranges will remain. Hence John has 3 oranges more than his sister.
Subtraction table.
1 from 1 leaves 0 2 from 2 leaves 0 1 3 16 C-10 08- 0 00 6 10 1 66 8 1 o 9 1 10 1 611 1 1 12 1 6 13 6 4 10 11 2 612 2 6 13 2 6 14 6 1 3 from 3 64 3 leaves CON RON OD COCO O O O O O 4 from 4 leaves 4 65 66 4 6 6 6 4 c6 7 66 66 8 64 3 6 6 66 C
-06
10 -00 0 O O 6 13 4 4 4 4 6 12 13 6 14 15 " 16 6 66 16 16 10 O GO 03 15 124
