Question

1. Completati spatiile puncate:
a) 2 supra 3 - 1 supra 7 = ........
b) -11 supra 4 - 3 supra 2 + 17 supra 3 = .........
c) 6 supra - 23 supra 22 + 5 supra 2 = ........

Answer 1

a. 2/3-1/7=14/21-3/21=11/21⇒fractie ireductibila;
b. -11/4-3/2+17/3=-11/4-6/4+17/3=-17/4+17/3=-51/12+68/12=17/12⇒fractie ireductibila;
c. -6/23·1/22+5/2
⇒-3/23·1/11+5/2
⇒-3/253+5/2
⇒-6/506+1265/506=1259/506⇒fractie ireductibila;

Answer 2

a)$\frac{2}{3} - \frac{1}{7}= \frac{14}{21} - \frac{3}{21} = \frac{11}{21}$
b)$\frac{-11}{4} - \frac{3}{2} = \frac{-11}{4} - \frac{6}{4}= \frac{-17}{4}$