Question

Efectuați diferența x-y scriind rezultatul în fiecare caz sub forma unei fracții zecimale.

Answer 1

a) x=8,(5) =(85-8)/9 =77/9
    y=4,(3)=(43-4)/9=39/9
x-y=77/9-39/9=38/9=4,(2)

b) x=18,(23) =(1823-18)/99 =1805/99
    y=7,(19)=(719-7)/99=712/99
x-y=1805/99-712/99=1093/99=11,(04)

c) x=15,(4) =(154-15)/9 =139/9
    y=9,(3)=(93-9)/9=84/9
x-y=139/9-84/9=55/9=6,(1)

d) x=11,2(5) =(1125-112)/90 =1013/90
    y=6,1(3)=(613-61)/90=552/90
x-y=1013/90-552/90=461/90=5,1(2)

e) x=11,3(4) =(1134-113)/90 =1021/90
    y=5,(6)=(56-5)/9=51/9
x-y=1021/90-51/9=(1021-510)/90=511/90=5,6(7)

f) x=4,(8) =(48-4)/9 =44/9
    y=2,5(57)=(2557-25)/990=2532/990
x-y=44/9-2532/990=(4840-2532)/990=2308/990=1154/495=2,33(13)