124
punti
Livello 1
$\frac{21}{20}-(\frac{8}{5}-\frac{1}{7}-\frac{3}{2}):(\frac{19}{14}+\frac{5}{28}-\frac{11}{7})-\frac{4}{3}*(-\frac{1}{2}+\frac{5}{16})=$
$=\frac{21}{20}-(\frac{112-10-105}{70}):(\frac{38+5-44}{28})-\frac{4}{3}*(\frac{-8+5}{16})=$
$=\frac{21}{20}+\frac{3}{70}:(-\frac{1}{28})-\frac{4}{3}*(-\frac{3}{16})=$
$=\frac{21}{20}+\frac{3}{70}*(-28)+\frac{1}{4}=$
$=\frac{21}{20}-\frac{6}{5}+\frac{1}{4}=$
$=\frac{21-24+5}{20}=\frac{2}{20}=\frac{1}{10}$
5198
punti
Livello 6
21/20 - (8/5-1/7-3/2)/(19/14+5/28-11/7)-4/3(-1/2 + 5/16)
21/20 - ( (14*8 - 10 - 3*35)/70 )/ ((2*19 +5 - 11*4 )/28)-4/3((-8+ 5)/16) =
= 21/20 - (-3/70 )*(28/(-1))-4/3((-3)/16) = 21/20 - (3/10 )*(4/(1)) + 1((1)/4) = 21/20 - (12/10 ) + (1)/4 = (21 - 24 + 5 )/20 = 2/20 =1/10
7583
punti
Livello 5