Question

calcule:
a)36,49 -25,4=
b)805,38 - 509,69=
c)1-V4/9=
d)(+5/8)+(+1/2)+(-2/15)=
e)(+1/2)+(-1/3)+(+1/5)=
           

Answer 1

a)36,49 -25,4= 11,09

b)805,38 - 509,69= 295,69

c)1-V4/9= 1 - 7 = -6

d)(+5/8)+(+1/2)+(-2/15)=
   5/8 + 1/2 - 2/15 = --------mmc(8,2,15) = 120
   75/120 + 60/120 - 16/120 = 119/120
e) (+1/2)+(-1/3)+(+1/5)=
     1/2 - 1/3 + 1/5 = -----mmc(2,3,5) = 30
     15/30 - 10/30 + 6/30 =  11/30