Question

Ex 5 plz va rog Renate DUMNEATA ESTI SPERANTA.

Answer 1

a)320/321 -1/7 +1/321 -6/7=320/321 +1/321 -1/7 -6/7=321/321-7/7=1-1=0
b)126/123 +1/5 +4/5 -124/123-2/123=126/123 -124/123-2/123+1/5 +4/5=
=(126-124-2)/123+5/5=0/123+1=0+1=1
c)23,75 + 7/5 -2/5 +0,25 =23,75 +0,25+ 7/5 -2/5 = 24+5/5=24+1=25
d)11,5+3/7-10,5+4/7=11,5-10,5+4/7+3/7=1+7/7=1+1=2
e) -11/101-57/110+11/101+57/110-110/110+101/101=
= (-11/101+11/101)+(-57/110+57/110)+(-1+1)=0+0+0=0