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==