Răspuns:
6 a)2
b)1
c)1
d)1
e)4/19
f)1
8 a)4/3
b)67/63
c)43/60
d)23/11
Explicație pas cu pas:
6 a) (10/12 +9/12)×24/19= 19/12×24/19= 2
b) (6/36+28/36)×18/17= 34/36×18/17= 2/2= 1
c) (20/24+21/24)×18/41+1/4= 41/24×18/41+1/4= 9/12+3/12= 12/12= 1
d) (15/36-6/36)×4= 9/36×4= 1/4×4= 1/1= 1
e) (22/90-2/90)×18/19= 20/90×18/19= 2/9×18/19= 4/19
f) (55/60-28/60)×10/9+1/2= 27/60×10/9+1/2= 3/6+3/6= 6/6= 1
8 a) (10/12+9/12)×24/19-(4/6-1/6)×4/3= 19/12×24/19-3/6×4/3= 2/1-2/3= 6/3-2/3= 4/3
b) (6/36+28/36)×18/17+2/3×(3/21-1/21)= 34/36×18/17+2/3×2/21= 2/2+4/63= 126/126+8/126= 134/126= 67/63
c) (20/24+21/24)×18/41+4/15×(6/8-4/8-1/8)= 41/24×18/41+4/15×1/8= 9/12+1/30= 45/60+2/60= 43/60
d) (15/36-6/36)×4+1/11+(4/3-3/3)×3= 9/36×4+1/11+1/3×3= 4/4+1/11+3/3= 1+1/11+1= 11/11+1/11+11/11= 23/11
sper ca te-am ajutat
