a) $A=2,34+5,35+7,66+4,65$

b) $B=2,13.75+2,13.25$

c) $C=\genfrac{}{}{0ex}{}{1}{3}-\genfrac{}{}{0ex}{}{1}{3}:\genfrac{}{}{0ex}{}{3}{4}$

a) $A=2,34+5,35+7,66+4,65$

$=(2,34+7,66)+(4,65+5,35)$

$=10+10$

$=20$

b) $B=2,13.75+2,13.25$

$=2,13.(75+25)$

$=2,13.100$

$=213$

c) $C=\genfrac{}{}{0ex}{}{1}{3}-\genfrac{}{}{0ex}{}{1}{3}:\genfrac{}{}{0ex}{}{3}{4}$

$=\genfrac{}{}{0ex}{}{1}{3}-\genfrac{}{}{0ex}{}{1}{3}.\genfrac{}{}{0ex}{}{4}{3}$

$=\genfrac{}{}{0ex}{}{1}{3}-\genfrac{}{}{0ex}{}{4}{9}$

$=\genfrac{}{}{0ex}{}{3}{9}-\genfrac{}{}{0ex}{}{4}{9}$

$=\genfrac{}{}{0ex}{}{-1}{9}$
 

a) $A=2,34+5,35+7,66+4,65$

b) $B=2,13.75+2,13.25$

c) $C=\genfrac{}{}{0ex}{}{1}{3}-\genfrac{}{}{0ex}{}{1}{3}:\genfrac{}{}{0ex}{}{3}{4}$

a) $A=2,34+5,35+7,66+4,65$

$=(2,34+7,66)+(4,65+5,35)$

$=10+10$

$=20$

b) $B=2,13.75+2,13.25$

$=2,13.(75+25)$

$=2,13.100$

$=213$

c) $C=\genfrac{}{}{0ex}{}{1}{3}-\genfrac{}{}{0ex}{}{1}{3}:\genfrac{}{}{0ex}{}{3}{4}$

$=\genfrac{}{}{0ex}{}{1}{3}-\genfrac{}{}{0ex}{}{1}{3}.\genfrac{}{}{0ex}{}{4}{3}$

$=\genfrac{}{}{0ex}{}{1}{3}-\genfrac{}{}{0ex}{}{4}{9}$

$=\genfrac{}{}{0ex}{}{3}{9}-\genfrac{}{}{0ex}{}{4}{9}$

$=\genfrac{}{}{0ex}{}{-1}{9}$
 

a) $A=2,34+5,35+7,66+4,65$

b) $B=2,13.75+2,13.25$

c) $C=\genfrac{}{}{0ex}{}{1}{3}-\genfrac{}{}{0ex}{}{1}{3}:\genfrac{}{}{0ex}{}{3}{4}$

a) $A=2,34+5,35+7,66+4,65$

$=(2,34+7,66)+(4,65+5,35)$

$=10+10$

$=20$

b) $B=2,13.75+2,13.25$

$=2,13.(75+25)$

$=2,13.100$

$=213$

c) $C=\genfrac{}{}{0ex}{}{1}{3}-\genfrac{}{}{0ex}{}{1}{3}:\genfrac{}{}{0ex}{}{3}{4}$

$=\genfrac{}{}{0ex}{}{1}{3}-\genfrac{}{}{0ex}{}{1}{3}.\genfrac{}{}{0ex}{}{4}{3}$

$=\genfrac{}{}{0ex}{}{1}{3}-\genfrac{}{}{0ex}{}{4}{9}$

$=\genfrac{}{}{0ex}{}{3}{9}-\genfrac{}{}{0ex}{}{4}{9}$

$=\genfrac{}{}{0ex}{}{-1}{9}$
 

a) $A=2,34+5,35+7,66+4,65$

b) $B=2,13.75+2,13.25$

c) $C=\genfrac{}{}{0ex}{}{1}{3}-\genfrac{}{}{0ex}{}{1}{3}:\genfrac{}{}{0ex}{}{3}{4}$

a) $A=2,34+5,35+7,66+4,65$

$=(2,34+7,66)+(4,65+5,35)$

$=10+10$

$=20$

b) $B=2,13.75+2,13.25$

$=2,13.(75+25)$

$=2,13.100$

$=213$

c) $C=\genfrac{}{}{0ex}{}{1}{3}-\genfrac{}{}{0ex}{}{1}{3}:\genfrac{}{}{0ex}{}{3}{4}$

$=\genfrac{}{}{0ex}{}{1}{3}-\genfrac{}{}{0ex}{}{1}{3}.\genfrac{}{}{0ex}{}{4}{3}$

$=\genfrac{}{}{0ex}{}{1}{3}-\genfrac{}{}{0ex}{}{4}{9}$

$=\genfrac{}{}{0ex}{}{3}{9}-\genfrac{}{}{0ex}{}{4}{9}$

$=\genfrac{}{}{0ex}{}{-1}{9}$
 

a) $A=2,34+5,35+7,66+4,65$

b) $B=2,13.75+2,13.25$

c) $C=\genfrac{}{}{0ex}{}{1}{3}-\genfrac{}{}{0ex}{}{1}{3}:\genfrac{}{}{0ex}{}{3}{4}$

a) $A=2,34+5,35+7,66+4,65$

$=(2,34+7,66)+(4,65+5,35)$

$=10+10$

$=20$

b) $B=2,13.75+2,13.25$

$=2,13.(75+25)$

$=2,13.100$

$=213$

c) $C=\genfrac{}{}{0ex}{}{1}{3}-\genfrac{}{}{0ex}{}{1}{3}:\genfrac{}{}{0ex}{}{3}{4}$

$=\genfrac{}{}{0ex}{}{1}{3}-\genfrac{}{}{0ex}{}{1}{3}.\genfrac{}{}{0ex}{}{4}{3}$

$=\genfrac{}{}{0ex}{}{1}{3}-\genfrac{}{}{0ex}{}{4}{9}$

$=\genfrac{}{}{0ex}{}{3}{9}-\genfrac{}{}{0ex}{}{4}{9}$

$=\genfrac{}{}{0ex}{}{-1}{9}$
 

a) $A=2,34+5,35+7,66+4,65$

b) $B=2,13.75+2,13.25$

c) $C=\genfrac{}{}{0ex}{}{1}{3}-\genfrac{}{}{0ex}{}{1}{3}:\genfrac{}{}{0ex}{}{3}{4}$

a) $A=2,34+5,35+7,66+4,65$

$=(2,34+7,66)+(4,65+5,35)$

$=10+10$

$=20$

b) $B=2,13.75+2,13.25$

$=2,13.(75+25)$

$=2,13.100$

$=213$

c) $C=\genfrac{}{}{0ex}{}{1}{3}-\genfrac{}{}{0ex}{}{1}{3}:\genfrac{}{}{0ex}{}{3}{4}$

$=\genfrac{}{}{0ex}{}{1}{3}-\genfrac{}{}{0ex}{}{1}{3}.\genfrac{}{}{0ex}{}{4}{3}$

$=\genfrac{}{}{0ex}{}{1}{3}-\genfrac{}{}{0ex}{}{4}{9}$

$=\genfrac{}{}{0ex}{}{3}{9}-\genfrac{}{}{0ex}{}{4}{9}$

$=\genfrac{}{}{0ex}{}{-1}{9}$
 

a) $A=2,34+5,35+7,66+4,65$

b) $B=2,13.75+2,13.25$

c) $C=\genfrac{}{}{0ex}{}{1}{3}-\genfrac{}{}{0ex}{}{1}{3}:\genfrac{}{}{0ex}{}{3}{4}$

a) $A=2,34+5,35+7,66+4,65$

$=(2,34+7,66)+(4,65+5,35)$

$=10+10$

$=20$

b) $B=2,13.75+2,13.25$

$=2,13.(75+25)$

$=2,13.100$

$=213$

c) $C=\genfrac{}{}{0ex}{}{1}{3}-\genfrac{}{}{0ex}{}{1}{3}:\genfrac{}{}{0ex}{}{3}{4}$

$=\genfrac{}{}{0ex}{}{1}{3}-\genfrac{}{}{0ex}{}{1}{3}.\genfrac{}{}{0ex}{}{4}{3}$

$=\genfrac{}{}{0ex}{}{1}{3}-\genfrac{}{}{0ex}{}{4}{9}$

$=\genfrac{}{}{0ex}{}{3}{9}-\genfrac{}{}{0ex}{}{4}{9}$

$=\genfrac{}{}{0ex}{}{-1}{9}$