Question

1. Calculati media artimetica a numerelor:
a) 8 si 18; b) 11 si 31; c) 203 si 507; d) 457 si 393.
2. Calculati media artimetica a numerelor: 
a) 2; 7 si 24; b) 9; 13 si 8; c) 9; 19;17 si 3; d) 6; 12; 21; 33 si 3.
3. Media artimetica a numerelor 17 si x este 35. Calculati x.
4. Cristina are la geografie notele 5, 7 si 9. Calculati media Cristinei la geografie.
5. In saptamana 7-13 mai, temperaturile masurate de Maria au fost: 14 grade C, 17 grade C, 21 grade C, 19 grade C, 17 grade C, 18 grade C, 20 grade C. Calculati media temperaturilor din cele 7 zile.

Answer 1

1. a) ma = 8 +18 totul supra 2 =26/2=13, ma=13
    b) ma= 11+31 totul supra 2 = 42/2 = 21, ma = 21
    c) ma = 203 + 507 totul supra 2 = 710/2 = 355, ma = 355
    d) ma = 457+ 393 totul supra 2= 850/2 = 425, ma = 425

2. a) ma = 2+7+24 totul supra 3 = 33/3 = 11, ma = 11
    b) ma = 9+13+8 totul supra 3 = 30/3 = 10, ma = 10
    c) ma = 9 +19+17+3 totul supra 4 = 48/4 = 12, ma = 12
    d) ma = 6+12+21+33+3 totul supra 5 = 75/5 = 15, ma = 15

Answer 2

1)a)ma=(8+18):2;ma=26:2=13
   b)ma=(11+31):2;ma=42:2=21
   c)ma=(203+507):2;ma=710:2=355
   d)ma=(457+393):2;ma=850:2=425
2)a)ma=(2+7+24):3;ma=33:3=11
   b)ma=(9+13+8):3;ma=30:3 =10
   c)ma=(9+19+17+3):4;ma=48:4=12
   d)ma =(6+12+21+33+3):5;ma=75:5=15
3)(17+x):2=35;17+x=35*2;17+x=70;x=70-17;x=53
4)ma=(5+7+9):3;ma=21:3;ma=7
5)ma=(14+17+21+19+17+18+20):7;ma=126:7;ma=18