Răspuns :
a) = (3 + 5) / 8 = 8/8 = 1
b) = ( - 3 + 7) / 10 = 4 / 10 = 0,4
c) = (2 - 5) / 6 = - 3 / 6 = - 0,5
d) = ( - 7×2 - 5) / 6 = ( - 14 - 5) / 6 = - 19 / 6 = - 3,1(6)
e) = - 12/12 + (- 5/12) = ( -12 - 5) / 12 = - 17 / 12 = - 1,41(6)
f) = 8/8 + ( - 7/8) = ( 8 - 7) / 8 = 1 / 8 = 0,125
a) ( + 3 / 8 ) + ( + 5 / 8 ) = ( 3 + 5 ) / 8 = 8 / 8 = 1
b) ( - 3 / 10 ) + ( 7 / 10 ) = ( - 3 + 7 ) / 10 = 4 / 10 = 2 / 5
c) ( + 2 / 6 ) + ( - 5 / 6 ) = ( 2 - 5 ) / 6 = - 3 / 6 = - 1 / 2
d) ( - 7 / 3 ) + ( - 5 / 6 ) = - 14 / 6 - 5 / 6 = - 19 / 6 = - 3 intregi si 1 / 6
e) - 1 + ( - 5 / 12 ) = - 12 / 12 - 5 / 12 = - 17 / 12 = - 1 intreg si 5 / 12
f) 1 + ( - 7 / 8 ) = 8 / 8 - 7 / 8 = 1 / 8