Question

Efectuati folosind procedeul mai avantajos.

8 * 5 + 12 * 5 =
12 * 5 - 8 * 5 =

7 * 3 + 3 * 4 + 9 * 3 =
4 * 16 + 5 * 4 - 4 * 18 =

24 * 23 + 15 * 23- 23 * 3
11 * 5 + 8* 11 + 11 * 11

Answer 1

8 * 5 + 12 * 5 = 5*(8+12)=5*20=100
12 * 5 - 8 * 5 = 5*(12-8)=5*4=20
7 * 3 + 3 * 4 + 9 * 3 = 3*(7+4+9)=3*20=60
4 * 16 + 5 * 4 - 4 * 18 = 4*(16+5-18)=4*3=12
24 * 23 + 15 * 23- 23 * 3=23*(24+15-3)=23*36=828
11 * 5 + 8* 11 + 11 * 11=11*(5+8+11)=11*24=264