Д) -2/7+5/42= е) 3/14+(-11/21)= ж) -4/9+1= з) 5 3/4+(-5 5/6)=

Question

Д) -2/7+5/42=
е) 3/14+(-11/21)=
ж) -4/9+1=
з) 5 3/4+(-5 5/6)=

Answer 1

Д) -2/7+5/42= -12/42+5/42=-7/42= -1/6

е) 3/14+(-11/21)=9/42-22/42= -13/42= - 1/4

ж) -4/9+1= 5/9

з) 5 3/4+(-5 5/6)= 23/4- 35/6 =69/12 - 70/12 = - 1/12