2.( 1) 1× 1× 14 = 14cm? 3×6- 14=4cm?
(2) 1× 1× 18 = 18cm? 4×6- 18=6cm?
3. From the above, the rule is: every time you spell one more, the area decreases by 2cm? .
1× 1×6×20 = 120cm? 1× 1×6-38=82cm?