\set_margins 10
%f011
%uSubtraction%u%n%n

\set_margins 10
%f010
Subtract From 10, Add the Extra%n%n

\set_margins 20
%f014
Use this strategy when you subtract from a number greater
 than 10.%n%n

\set_margins 20
%f015
Subtract. 13 - 6 = ?%n

\image subfrm10.pcx

Start with the %ularger%u number, 13. Think of how many more
 13 is than 10; picture the 3.%n%n

Subtract 6 from 10; picture the 4. (10 - 6 = 4)%n
Add the 3 and 4 to arrive at the answer, 7. (3 + 4 = 7)%n%n

%n%n
