Question

Calculeaza si ordoneza descrescător rezultatele de mai jos:

A=1/7+1/7:1/2

B=(3/4+1/2)×4/25

C=1/2×3/4+(1/2)²×1/2

Va rog repedeeee!
Dau coroană

Answer 1

Răspuns:

A=1/7+2/7=3/7

B=5/4×4/25=1/5

C=3/8+1/4×1/2=3/8+1/8=4/8

Ordonate crescător sunt 1/5, 3/7, 4/8

Answer 2

Răspuns:

c > a > b

Explicație pas cu pas:

a = 1/7 + 1/7 : 1/2

= 1/7 + 1/7x2/1

= 1/7 + 2/7

= 3/7

b = (3/4 + 1/2)x4/25

= (3/4 + 2/4)x4/25

= 5/4x4/25

= 5/25

= 1/5

c = 1/2x3/4 + (1/2)²x1/2

= 3/8 + 1/4x1/2

= 3/8 + 1/8

= 4/8

= 1/2

aducem fractiile la acelasi numitor

cmmmc(2;5;7) = 70

3/7 = 30/70

1/5 = 14/70

1/2 = 35/70

35/70 > 30/70 > 14/70

c > a > b