Question

BUNa ofer  100 pcte . 
Vreau rezolvarea completa
1) Calculati :
1a)-0,5+0,75+[-1,(6)]+1,5-0,(3) +0,25;
1b) $[- \frac{4}{7} ]+ \frac{6}{35} +[- \frac{31}{25}]+ \frac{8}{20} + \frac{1}{25}.$

Answer 1

1a)-0,5+0,75+[-1,(6)]+1,5-0,(3) +0,25=
-0,5+0,75-1,(6)+1,5-0,(3) +0,25=0.25+0.25+1.5-1.(6)-0.(3)=0.50+1.5-1.(6)-0.(3)=1.55--1.(6)-0.(3)=-0.(8)-0.(3)=-0.(11)

 b)

=-4·100/700+6·20/700-31·28/700+8·35/700+28/700=-400/700+120/700-868/700+280/700+28/700=920/700-868/700+280/700+28/700=52/700+280/700+28/700=332/700+28/700=360/700=36/70=18/35