Oblicz:
a)
-1,8·⅔-0,8·(¾)²
⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻=
-0,9·5/9+(-½)
b)
-2·(-0,5)²+(-2)
-------------------=
-0,1·[-1,3+6·(-0,2)]
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a)
-18/10*2/3-8/10*9/16
-------------------------- =
-9/10*5/9-1/2
-6/5-9/20
--------------- =
-1/2-1/2
-(-24/20-9/20)=-(-33/20)=33/20=1 i 13/20=1 i 80/100=1.8
b)
-2*0.25-2
------------------- =
-0.1*(-1.3-1.2)
-0.5-2
------------ =
-0.1*(-2.5)
-2.5
------ =
0.25
-25/10*100/25=-10