Question

Efectuati:

a ) ( -7/18 + 2 intregi 1/9 ) - ( -3 intregi 1/2 + 4 );
b ) ( -5 intregi 3/4 - 2intregi 5/6 ) + ( -5/16 + 2 intregi 1/12 );
c ) ( -2 intregi 1/21 ) + ( -1 intregi 2/7 + 2/3 );
d) ( 1 intregi 1/6 + 3 intregi 2/9 ) + ( -1 intregi 2/3 + 2 intregi 7/18 );
e) ( -2 intregi 5/45 ) + ( 3 intregi 2/5 - 1 intregi 4/15 ) + ( -7/45 );

Va roggg :D

Answer 1

a(-7/18 +19/9)- (-7/2+ 4 )=(-7+38)/18-(-7+8)/2=31/18-1/2=(31-9)18=
 = 22/18=11/9 = 1intreg si 2/9

b(-23/4 -17/6)+ (-5/16+ 25/12)=(-69-34)/12+(-15+100)/48=-103/12+85/48=
=(-412+85)/48= - 327/48 = -6 intrgi si 39/48

c(-43//21 ) + (-9/7 + 2/3 )= -43/21-27/21+14/21= -56/21= -8/3= - 2intregi si 2/3

d(7/6 +29/9 ) + (-5/3 + 42/18)=(21+58-30+42)/18=91/18=5 intregi si 1/18

e( -95/45 ) + (17/5 - 19/15 ) + ( -7/45 )= (-95+323-7) /45= 221/45= 4 intregi si
 41/45.