(2) 3. The square of14 * 2 *15 = 188.4 square centimeters,1*188.4 * 7.8 = 489.8 grams.
(3) 72 * 3 = 216cm316/36 = 6cm.
④ Two thirds of 24 = 36g 36 * 1 = 12g.
(5) 3. The square of14 * (3/2) *4=28.26 cubic centimeters 4*4 = 3 centimeters.
3. 14*(3/2) square * 3 = 2 1. 195 three thirds1* 21.195 = 7.065 square centimeters.
28.26+7.065=35.325 cubic centimeters is approximately equal to 35 square centimeters.
I'm sure it's right, because I wrote it and the teacher corrected it. It's okay.