\set_margins 10
%f011
%uFact Families%u%n

\set_margins 20 20
%f010
When you learn one arithmetic fact, you automatically learn
 several related facts. These related facts represent "fact
 families."%n

\set_margins 20 20
%f011
Example:%n%n

%f015
Knowing that 6 + 2 = 8, you also know that 2 + 6 = 8,%n
8 - 2 = 6 and 8 - 6 = 2. These four facts comprise the fact
 family for 6 and 2.%n%n

%b000%f010
%t050 6 + 2 = 8 %n
%t050 2 + 6 = 8 %n
%t050 8 - 2 = 6 %n
%t050 8 - 6 = 2 %n%n
%b000

%n%n
         
