Răspuns :

Răspuns:

(7/8·4/5+3/4-1/4):7/9=

(²⁾7/10+⁵⁾3/4-⁵⁾1/4)·9/7=

(14/20+15/20-5/20)·9/7=

(24/20)⁽⁴·9/7=

6/5·9/7=54/35

Răspuns: 54/35

Explicație pas cu pas:

(7/8 · 4/5 + 3/4 - 1/4) : 7/9 =

(7/2 · 1/5 + 3/4 - 1/4) · 9/7 =

(7/10 + 3/4 - 1/4) · 9/7 =

aducem la același numitor in paranteza

(²⁾7/10 + ⁵⁾3/4 - ⁵⁾1/4) · 9/7 =

(14/20 + 15/20 - 5/20) · 9/7 =

(14 + 15 - 5)/20 · 9/7 =

24/20 · 9/7 =

216/140 =

54/35

Bafta multa !

==pav38==