Răspuns:
a) (4/15+ 28,5/15) - (1/15+ 13,5/15)= 32,5/15-14,5/15= 18/15
b) (1-2,1/7)-( -6+4,9/7)= -1,1/7 - (-1,1/7) = -1,1/7 +1,1/7= 0
c)-10-(3+2+1/6)= -10- 6/6=-10-1= -11
d) -0,19- (-4,76-5/4)+3/4= -0,19+9,76/4+3/4= -0,76 +10,76/4=10/4
e)-2,15+4/13-0,85+9/13= -27,95+4-11,05+9/13= -26/13= -2
f) (6+2-21/10)-(6+2-79/10)=-13/10+71/10= 58/10
Explicație pas cu pas:
