Question

Efectuati
a)(+3/4)-(+2/3)=
b)(-5/6)-(+7/9)=
c)(-11/12)-(-5/8)=
d)(-5/4)-(-3/4)=
e)(+5/3)-(3/4)=

Answer 1

a) (+3/4)-(+2/3)=3/4 - 2/3 = 9/12 - 8/12 = 1/12
prima fractie am amplificat-o cu 3,a 2-a cu 4

b) (-5/6)-(+7/9)= - 5/6 - 7/9 = - 15/18 - 14/18 = - 29/18
primafractie am amplificat-o cu 3,iar a 2-a cu 2

c) (-11/12)-(-5/8)= - 11/12 + 5/8 = - 22/24 + 15/24 = -7/24
prima fractie am amplificat-o cu 2,a 2-a cu 3

d) (-5/4)-(-3/4)= - 5/4 + 3/4 = - 2/4 = - 1/2

e) (+5/3)-(3/4)= 5/3 - 3/4 = 20/12 - 9/12 =
= 11/12
prima fractie am amplificat-o cu 4,iar cea de a 2-a cu 3