Question

a) [(-0,5) * 4/5 - (-0,8) * 10/12 ] : [1- (1 - 2/3 ) * (2/3 - 1)]=

b)-2,1 + (- 4/3) * 9/5 : 0,1 + 2,125=

Proszę pomożcie. ;((

Answer 1

[(-0,5) * 4/5 - (-0,8) * 10/12 ] : [1- (1 - 2/3 ) * (2/3 - 1)]=

[(-1/2)*4/5+8/10*10/12]:[1-(1/3* (-1/3))]= [-4/10+8/12]:(-1/9)=

[-24/60+40/60]*(-9)=16/60*(-9)= -144/60= -2 24/60= -2 2/5= -2,4

 

 

-2,1 + (- 4/3) * 9/5 : 0,1 + 2,125=-21/10-4/3*9/5:1/10+2125/1000=

-21/10-4/3*9/5*10+2125/1000=

-21/10-360/15+2125/1000= -2,1-24+2,125= -23,975