Odpowiedzi

2010-02-04T14:49:22+01:00
1. =-2.5+10/12-1/12+9/12+2,25=18/12-3/12=15/12=5/4=1 i 1/4

2. =1,25:(-0,2) x 0,3=-1,875

3. =5,2-0,2 x (-0,5)=5,2+0,1=5,3

4. =-3,6:(-0,6)x5=10,8

5. =-0,6x3,5+4,2x(-1 i 1/6)=-2,1+(-4,9)=7
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2010-02-04T14:56:50+01:00
1.
(-2,5)-(-5/6)-1/12-(-3/4)-(-2,25)=(-5/2)+5/6-1/12+3/4+9/4=(-30/12)+10/12-1/12+9/12+27/12=15/12=5/4=1 i 1/4

2.
1 1/4:(-0,2) x 0,3=5/4:(-2/10)x3/10=5/4x(-10/2)x3/10=(-25/4)x3/10=-15/8=-1 i 7/8

3.
5,2-1/5 x (-0,5)=52/10-1/5x(-1/2)=52/10+2/10=54/10=5,4

4.
-3,6:(-3/5)x5=-36/10x(-10/35)x5=36/35x5=180/35=5 i 1/7

5.
-0,6 x 3 1/2 +4,2 x (-1 1/6)=(-6/10)x7/2+42/10x(-7/6)=(-21/10)+(-49/10)=-70/10=-7


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2010-02-04T15:02:21+01:00
1) -25/10+5/6-1/12+3/4+9/4=-5/2+5/6-1/12+12/4=-30/12+10/12-1/12+36/12=6/12+9/12=15/12=5/4=1i1/4

2)
5/4*(-5)*3/10=-15/8=-1i7/8

3)
52/10-1/5*(-1/2)=52/10+1/10=53/10=5i3/10

4)
-18/5*(-5/3)*5=30

5)
-6/10*7/2+21/5*(-7/6)=-21/10-49/10=-70/10=-7
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