Răspuns:
a) 1 8/9 + 3 4/15 =
(9/9+8/9)+[(3×15)/15+ 4/15]=
17/9+49/15=
Numitor comun 45
(17×5+49×3)/45=
(85+147)/45=
232/45=
5 7/45
b) -17/16 + 5/24 =
Numitor comun :48
(-17×2+5×2)/48=
(-34+10)/48=
-24/48=
-1/2
c) 12/35 × (-5/6) =
- 12×5 / 35×6=
Simplificam
-2×1/ 7×1=
-2/7
d) 11/22 ÷ 17/15=
11/22 ×15/17=
1/2×15/17
1×15/ 2×17=
15/34
Explicație pas cu pas:
