Oblicz:
a) [-24:(-6)-7*4]:(-12)=
b) 3 7/30 - 1 5/12=
c) 1 ⅙ : 4 ⅔ =
d) (2,85 - ½) + ( ⅞ - 0,15) =
e) -7 4/9 - 2 ⅙ =
f) 4 ⅚ - 8,2 =
g) 6-(-7)*(-2)=
h) (-4,5) : (-3,6) + 2,6*2=
i) (-⅖+¼-0,2) : (-1,4)=
j) (-1+1/4):(-½+¼) =
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a)
[-24:(-6)-7*4]:(-12)= [4-28]:(-12) = (-24):(-12) = 2
b)
3 7/30 - 1 5/12= 97/30 - 17/12 = 194/60 - 85/60 = 109/60 = 1⁴⁹/₆₀
c)
1 ⅙ : 4 ⅔ = 7/6 : 14/3 = 7/6 * 3/14 = 21/84 = ¼
d)
(2,85 - ½) + ( ⅞ - 0,15) = (2,85-0,5) + (0,875-0,15) = 2,35+0,725 = 3,075
e)
-7 4/9 - 2 ⅙ = -67/9 - 13/6 = -134/18 - 39/18 = -173/18 = -9¹¹/₁₈
f)
4 ⅚ - 8,2 = 29/6 - 41/5 = 145/30 - 246/30 = -101/30 = -3¹¹/₃₀
g)
6-(-7)*(-2)= 6 - 14 = -8
h)
(-4,5) : (-3,6) + 2,6*2= 1,25 + 5,2 = 6,45
i)
(-⅖+¼-0,2) : (-1,4)= (-0,4+0,25-0,2) : (-1,4) = (-0,35) : (-1,4) = 0,25
j)
(-1+1/4):(-½+¼) = (-1+0,25) : (-0,5+0,25) = (-0,75) : (-0,25) = 3