Question

La ex 27 va rog am nevoie neaparat
Dau coroana!

Answer 1

Răspuns:

a) 2÷(2/3)^2+11/5÷11/10

2÷4/9+11/5×10/11

2×9/4+10/5

9/2+2

9/2+4/2

13/2

b) (3-1/3)^2+(2-1/2)-(1-1/2)

(9/3-1/3)^2+(4/2-1/2)^2-(3/2)^2

(8/3)^2+(3/2)^2-(3/2)^2

(8/3)^2=64/9

c) [(1/2+2/3+5/6)÷7/12-(2/5)×(5/6)]×(1/4)÷(5×12/25-1si 1/3)=

[(3/6+4/6+5/6)×12/7-(2/6)]×(1/4)÷(12/5-4/3)

[(12/6)×12/7-1/3]×((1/4)÷(36/15-20/15)

[(2×12/7-1/3)×4÷(16/15)

(24/7-1/3)×1/4×15/16

(72/21-7/21)×1/4×15/16

65/21×1/4×15/16

65×5/7×4/16

325/448