\set_margins 10
%f011
%uMultiplication%u%n%n

\set_margins 10
%f010
Multiplying by 9%n%n

\set_margins 20
%f015
To find the product of 9 and another number:  9 x  4 = ??%n
Multiply the other number by 10.              4 x 10 = 40%n
Then subtract that number from the product.  40 -  4 = 36.%n%n

Children may benefit from learning a fast finger method:%n
Hold up both hands, fingers extended. Starting on the left
 hand, from the little finger inward, count the other factor and
 hold that finger down.%n%n

\image mul9fngr.pcx

Look for patterns in the 9's times tables:%n%n

%t050 9 x 1 =  9
%t050 9 x 2 = 18 %t120 1 + 8 = 9%n
%t050 9 x 3 = 27 %t120 2 + 7 = 9%n
%t050 9 x 4 = 36 %t120 3 + 6 = 9%n
%t050 9 x 5 = 45 %t120 4 + 5 = 9%n
%t050 9 x 6 = 54 %t120 5 + 4 = 9%n%n

and so on ...%n%n%n

%n%n