6,75 kg + 6,75 kg + 6,75 kg = 6,75 kg x 3 = 20,25 kg
7,14m2 + 7,14m2 + 7,14m2 x 3 = 7,14m2 x 1 + 7,14m2 x 1 + 7,14m2 x 3 = 7,14m2 x ( 1 + 1 + 3 ) = 7,14 m2 x 5 = 35,7 m2
9,26 dm3 x 9 + 9,26 dm3 = 9,26 dm3 x 9 + 9,26 dm3 x 1 = 9,26dm3 x ( 9 + 1 ) = 9,26dm3 x 10 = 92,6 dm3
6,75 *3= 20,25
7,14 *3*3=64,26
9,26*2*9=166,68
a) =6,75kg.(1+1+1)=6,75.3=20,25kg
b) =7,14.(1+1+3)=7,14.5=35,7m2
c) =9,26.(9+1)=9,26.10=92,6dm3