Question

Calculati.
a) (- 3 supra 8)+(+1 supra 8)=
b) (-5 supra 9)+(+2 supra 9)
c) (-7 supra 12)+(-5 supra 12)
d) (+1 supra 2)+(- 3 supra 4)
e) (-3 supra 4)+(+1 supra 6)
f) (-2 supra 5)+(+3 supra 10)
g) (-5 supra 6 )+ (+1 supra 2)
h) (- 5 supra 8)+(-3 supra 4)
i) (-4 supra 7)+ (+3 supra 14)
j) (-5 supra 21)+(+9 supra 14)
VA ROG AJUTATI-MA

Answer 1

a) (- 3/8)+(+1/8)=-2/8=-1/4
b) (-5/9)+(+2/9)=-3/9=-1/3
c) (-7/12)+(-5/12)=-12/12=-1
d) (+1/2)+(- 3/4)=(+2/4)+(- 3/4)=-1/4
 e) (-3/4)+(+1/6)=(-9/12)+(+2/12)=-7/12
 f) (-2/5)+(+3/10)=(-4/10)+(+3/10)=-1/10
 g) (-5/6 )+ (+1/2)=(-5/6 )+ (+3/6)=-2/6=-1/3
 h) (- 5/8)+(-3/4)=(- 5/8)+(-6/8)=-11/8
 i) (-4/7)+ (+3/14)=(-8/14)+ (+3/14)=-5/14
 j) (-5/21)+(+9/14) =(-10/42)+(+27/42) =17/42

Answer 2

a) - 3/8 + 1/8 = - 2/8
b) - 5/9 + 2/9 = - 3/9, simplificat = - 1/3
c) - 7/12 - 5/12 = - 17/12
d) 1/2 - 3/4 = 2/4 - 3/4 = - 1/4
e) - 3/4 + 1/6 = - 9/12 + 2/12 = - 7/12
f) - 2/5 + 3/10 = - 4/10 + 3/10 = - 1/10
g) - 5/6 + 1/2 = - 5/6 + 3/6 = - 2/6 = - 1/3
h) - 5/8 - 3/4 = - 5/8 - 6/8 = - 11/8
i) - 4/7 + 3/14 = - 8/14 + 3/14 = - 5/14
j) - 5/21 + 9/14 = - 10/42 + 27/42 = 17/42