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(1)
1) -5/12 + 11/16= -20/48 + 33/48 = 13/48
2) 13/48 : (-13/72)=13/48*(-72/13)=-3/2=-1,5
(2)
1) 9/14 + 5/21 = 27/42 + 10/42 = 37/42
2) 37/42 : (-2 9/14) = 37/42 * (-14/37) = -1/3
(3)
1) 6,7 - 8,1 = -1,4
2) 2,3 * (-8 )= -18,4
3) 9,8 : (-1,4) = -7
4) -18,4 - (-7) = -18,4 + 7 = -11,4
(4)
1) 3,64 : (-1,4) = -2,6
2) -1,6 - 2,6 = -4,2
3) -4,2 : (-0,01) = 420
4) 420 : (-0,7) = -600
(5)
1) 7/16 - 31/40 = 35/80 - 62/80 = -27/80
2) -17/24 + 27/40 = -85/120 + 81/120 = -4/120 = -1/30
3) -27/80 : (-1/30) = 27/80 * 30/1 = 81/8 = 10 1/8
(6)
1) -4,5 : 9/14 = -9/2 * 14/9 = -7
2) -8 2/9 - (-7)=-8 2/9 + 7 = -1 2/9
3) -1 2/9 * 2 1/4 = -11/9 * 9/4 = -11/4 = -2 3/4
4) -3 3/4 - (-2 3/4 ) = -3 3/4 + 2 3/4 = -1
1) -5/12 + 11/16= -20/48 + 33/48 = 13/48
2) 13/48 : (-13/72)=13/48*(-72/13)=-3/2=-1,5
(2)
1) 9/14 + 5/21 = 27/42 + 10/42 = 37/42
2) 37/42 : (-2 9/14) = 37/42 * (-14/37) = -1/3
(3)
1) 6,7 - 8,1 = -1,4
2) 2,3 * (-8 )= -18,4
3) 9,8 : (-1,4) = -7
4) -18,4 - (-7) = -18,4 + 7 = -11,4
(4)
1) 3,64 : (-1,4) = -2,6
2) -1,6 - 2,6 = -4,2
3) -4,2 : (-0,01) = 420
4) 420 : (-0,7) = -600
(5)
1) 7/16 - 31/40 = 35/80 - 62/80 = -27/80
2) -17/24 + 27/40 = -85/120 + 81/120 = -4/120 = -1/30
3) -27/80 : (-1/30) = 27/80 * 30/1 = 81/8 = 10 1/8
(6)
1) -4,5 : 9/14 = -9/2 * 14/9 = -7
2) -8 2/9 - (-7)=-8 2/9 + 7 = -1 2/9
3) -1 2/9 * 2 1/4 = -11/9 * 9/4 = -11/4 = -2 3/4
4) -3 3/4 - (-2 3/4 ) = -3 3/4 + 2 3/4 = -1
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