zadanie 5 str 85 zbior zadan, matematyka wokol nas klasa 1 gim
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a) (-2,5) : 1 2/3 -1,4=
b) 1 2/5 * (-1 3/7) +1/3 *[1+6:(-18)]=
c) 2,6 - 1/4 : [2-(-1,75)]=
d) [-2/3-(-1,8):(-1 1/5)] : (-1/25)=
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a)(-5/2): 5/3 -14/10= (-5/2)*3/5-14/10= -3/2 -14/10 = -15/10-14/10= -29/10= -2 i 9/10
= -2,9
b) 7/5*(-10/7) +1/3* (7:(-18))= -2+ 1/3*(7*(-1/18))= -2+1/3*(-7/18)= -2-7/54=
= -2 7/54
nie jestem pewna
c)2,6-0,25: 3,75 =13/5 - 1/4: 15/4= 13/5- 1/4*4/15=13/5 - 1/15= 39/15-1/15=38/15=
=2 i 8/15
d) (-2,3 -(-9/5):(-6/5)): (-1/25)= (-2,3 -(-9/5)*(-5/6)):(-1/25)= (-2,3 +3/2):(-1/25)=
= (-23/10 + 15/10):(-1/25)= (-8/10 ):(-1/25)=(-8/10)*(-25/1)=40/2= 20
a)-2i1/2*3/5-1i4/10=-5/2*3/5-14/10=-15/10-14/10=-29/10=-2i9/10
b)7 /5*(-10/7)+1/3*[1+(-108)]=-70/35+1/3*(-107)=-70/35-107/3=-210/105-3745/105=
-3955/105=37i2/3
c)26/10-1/4:[2+1i3/4)]=26/10-1/4:15/4=26/10-1/4*4/15=26/10-1/15=78/30-2/30=76/30=2i8/15
d)[-2/3+18/10:(-6/5)]:(-1/25)=[-2/3+18/10*(-5/6)]:(-1/25)=[-2/3-90/60]:(-1/25)=
[-40/60-90/60]:(-1/25)=(-130/60)*(- 25/1)=3250/60=54i1/6