Question

oblicz:

a) -3,6+2 3/7-1,4-(-11/7)=

b)-5,75+4 2/3-2,25-(-3 1/3)=

Answer 1

a)-3,6+2 3/7-1,4-(-11/7)=-3 6/10 + 2 3/7 - 1 4/10 -(-11/7)=

-3 6/10 + 2 3/7 - 1 4/10 + 11/7 = -36/10 + 17/7 - 14/10 + 11/7=

-252/70 + 170/70 - 98/70 + 110/70 = -82/70 - 98/70 + 110/70=

-180/70 + 110/70= -70/70 = -1

 

b)-5,75 + 4 2/3 - 2,25 -(-3 1/3)=-5 75/100 + 4 2/3 - 2 25/100-(-3 1/3)=

-5 75/100 + 4 2/3 - 2 25/100 + 3 1/3= - 575/100 + 14/3 - 225/100 + 4/3=

-1725/300 + 1400/300 - 675/300 + 400/300= -325/300 - 675/300 + 400/300=

-1000/300 +  400/300=-600/300=-2

 

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