Question

Mai b si d va rog de la 8

Answer 1

b) (35/9-3/2):(7/2+4/5)+22/9 amplificãm pe 35/9 cu 2 si pe 3/2 cu 9; pe 7/2 cu 5 si pe 4/5 cu 2
(70/18-27/18):(35/10+8/10)+22/9=43/18:43/10+22/9=43/18×10/43+22/9=5/9+22/9=27/9=3

d) (3,24-157/50):(53/10-4,84)×23/10=(81/25-157/50):(53/10-121/25)×23/10 amplificãm pe 81/25 cu 2,pe 53/10 cu 5 si pe 121/25 cu 2
(162/50-157/50):(265/50-242/50)×23/10=5/50:23/50×23/50=1/10×50/23×23/50=50/230×23/50=1/10

a) 3/5×10/9-7/9:(8/4-1/4)=2/3-7/9:7/4=2/3-7/9×4/7=2/3-4/9 amplificãm pe 2/3 cu 3
6/9-4/9=2/9

c) (2/3+513/100×1/9):371/100-1/3=(2/3+57/100):371/100-1/3 amplificãm pe 2/3 cu 100 si pe 57/100 cu 3
(200/300+171/300):371/100-1/3=371/300×100/371-1/3=1/3-1/3=0