2152
ARITHMETIC
The facts of multiplication as found in the tables should be thoroughly memorized.
Have children add by numbers: as, 1, 14, 21, 28, etc., 9, 18, 27, 36, etc. Good drill,—
4X6+2 7X5—6
3X8+5 8X4—3 Method of work.
Multiply 428 by 536. 428 536
2568 428X6 units = 2568 units 1284 428X3 tens = 1284 tens
2140 428X5 hundreds = 2140 hundreds
229,408 428X536 = 229408 units
Place the right-hand figure of each partial product under the figure of the multiplier which produces it.
Multiply 4862 by 4006.
4862 "When there are ciphers in the multiplier it is not neces-
4006 sary to multiply by them. Keep in mind that the first figure
—---------Of each partial product is to be written directly under the
29172 figure of the multiplier which produces it. This saves the 19448 work of writing the row of O's.
19,477,172
Multiply 482 by 10; 482 by 100.
482 482 If the multiplier is 10, annex one cipher to the mul-
10 100 tiplieand; if 100, annex 2 ciphers, etc.
4,820 48,200
The following drill will help fix in the mind the facts of the multiplication table.
