Question

Fara punctul a Dau 50 puncte si corona​

Answer 1

Răspuns:

a(²5/6+³3/4)24/19=(10+9)/12×24/19=

(19×24)/(12×19)=24/12=2

b)(³1/6+²7/9)18/17=(3+14)/18×(18/17)=

(17×18)/(18×17)=1

c)(⁴5/6+³7/8)18/41+1/4=(20+21)24×(18/41)+1/4=

(41/24)×(18/41)+1/4=(41×18)/(24×41)+1/4=

3/4+1/4=4/4=1

d)(³5/12-²3/18)×4=(10-6)/36×4=(4/36)×4=

(1/9)×4=4/9

e)(²11/45-³1/30)×18/19=(33-3)/90×(18/19)=

(30/90)×(18/19)=(1/9)×(18/19)=18/(9×19)=2/19

f)(⁵11/12-⁴7/15)×10/9+1/2=

(55-28)/70×10/9+1/2=(27/70)×(10/9)+1/2=

(27×10)/(70×9)+1/2=²3/7+⁷1/2=(6+7)/14=

13/14