oblicz.
A.) 0,75*(-45)-2 1/2 * (-0,24)=
B.) -12+12*[-(-6):3-3]=
C.) 0,25+4/5:(-0,8) ________________ =
- [(-15)* 1 1/2-1 1/2
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A) 0,75 *(-45) -2i1/2 *(-0,24) =
0,75 * (-45) -2,5 *(-0,24) =
- 33,75 + 0,6 = - 33,15
B) -12 + 12 * [-(-6) : 3 -3] =
-12 + 12 * [-(-2) -3] =
-12 + 12 * [2 -3 ] =
-12 + 12 *(-1) = -12 -12 = -24
C) 0,25 + 4/5 : (-0,8)
________________ =
-[(-15) *1i1/2 -1i1/2
0,25 + 0,8 : (-0,8)
_______________ =
-[(-15) *1,5 - 1,5]
0,25 - 1
____________ =
-[-22,5 - 1,5]
-0,75
___________ = -0,75 : 24 = - 0,03125
24