2, (1) length times width; Side length multiplied by side length

(2)4 cm

(3)2 4

(4) 16 square decimeter

3、( 1) 15? 15 = 225m2

(2) 15? 4=60 (meters)

4、( 1) 12? 2? 4=96 cm

(2)2? 4? 12+ 12? 2= 120 (cm)

(3)( 12? 2)2=576 (square centimeter); (to) equal to ...