1) Oblicz a) 5/12+5/18= b) 11/45-9/30= c) 7-(-2 1/2)do potęgi 2= d) 3/5+4/15-2/25= e) 5/12-2/15-3/10= f) -(-1 1/2)do potęgi 2-(-1 1/2)do potęgi 3=
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a) 5/12+5/18=(5*3)/(12*3)+(5*2)/18*2)=15/36+10/36=25/36
b) 11/45-9/30=(11*2)/(45*2)-(9*3)/30*3=22/90-27/90=-5/90=-1/18
c) 7-(-2 1/2)do potęgi 2=7-(-5/2)^2=7-25/4=7-6 1/4 =3/4
d) 3/5+4/15-2/25=9/15+4/15-2/25=13/15-2/25=325/375- 30/375=295/375=59/75
e) 5/12-2/15-3/10=75/180-24/180-54/180=-3/180=-1/60
f) -(-1 1/2)do potęgi 2-(-1 1/2)do potęgi 3=-(-3/2)^2-(-3/2)^3=
=-9/4 + 27/8 = - 18/ 8 + 27/8 =9/8= 1 1/8