Question

Ex 8 ca rog repede!!! Dau 10 puncte
​

Answer 1

Răspuns:

Explicație pas cu pas:

a) 0,6·1 1/9-7/9:(2-1/4)= 6/10·(10/9)-7/9:7/4=6/9-7/9·(4/7)=6/9-4/9= 2/9

b)(3 8/9-1,5):(3 1/2+0,8)+2,(4)= (35/9-15/10):(7/2+8/10)+22/9=

=(350-135)/90:(35+8)/10+22/9= 215/90:43/10+22/9=215/90·10/43+22/9= 215/(9·43)+22/9=5/9+22/9=27/9=3

c) (2/3+5,13:9):3 71/100-0,(3)=(2/3+0,57):371/100-3/9= (2/3+57/100)·100/371-1/3= (200+171)/300·100/371-1/3= (371·100)/(300·371)-1/3= 1/3-1/3=0

d) (1,8²-3 7/50):(53/10-2,2²)·2,3= (3,24-157/50):(53/10-4,84)·2,3= [(324-314)/100]:[(530-484)/100]·2,3=10/100·100/46·23/10= (10·100·23)/(100·46·10)= 23/46=1/2