Question

Va rog!
Dau coroana!

Answer 1

Răspuns:

/-supra

Explicație pas cu pas:

a) 3×5/9-14/2×5/28=

15/9-7×5/28

5/3-35/28

=5/3-5/4

=5/12

b)-1/2×[-4/5+3/4:(-9/8)]

-1/2×[(-4/5+3/4×(-9/8)]

-1/2×(-4/5-3/4×8/9)

-1/2×(-4/5-2/3)

-1/2×(-22/15)

11/15

c) - 8:(3/2×1/4-5/4×16/15)

-8:(3/8-5×4/15)

-8:(3/8-4/3)

-8:(-23/24)

8×24/23

192/23

d) 7/4×1/15+(-1/15)

7/60-1/15

1/20

e) - (-9/2)-4(-5/4+1/4×13/10×20/39)

9/2-4(-5/4+1/10×5/3)

9/2-4(-5/4+1/2×1/3)

9/2-4(-5/4+1/6)

9/2-4×(-13/12)

9/2+13/3

53/6