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

%f010
Counting Back%n%n

\set_margins 20
%f014
Use this strategy when subtracting 1, 2, or 3.%n%n

\set_margins 20
%f015
Find 6 - 2 by counting back. Start with the larger number, 6.%n
Count back 2.%n
You counted back to 4. 6 - 2 = 4%n

\image subcntbk.pcx

As with Counting On, children use the mental image of a set
 of steps. To find 6 - 2, start on the sixth stair, then count back
 2 steps.%n%n%n

%n%n