Răspuns :
a)0,75×0,(3)+0,75=75/100×3/9+75/100=1/4+75/100=25/100+75/100=25+75/100=100/100=1
b)0,75-0,(3)×0,75=75/100-3/9×75/100=75/100-1/4=75/100-25/100=75-25/100=50/100=1/2
b)0,75-0,(3)×0,75=75/100-3/9×75/100=75/100-1/4=75/100-25/100=75-25/100=50/100=1/2