10, ( -2 )- -5/8 11, 1/-8 – -5/9 12, 4/13 – -(-12)/39 13, -( -1)/21 – 1/28 14, -3/29 – 16/58 15, 8/40 – –

10, ( -2 )- -5/8
11, 1/-8 – -5/9
12, 4/13 – -(-12)/39
13, -( -1)/21 – 1/28
14, -3/29 – 16/58
15, 8/40 – -36/45
16, -8/18 – -15/27
17, 13/30 – -1/5
18, 2/21 – 1/28
18, 5- -3/4
20, 18/14 – 35/-10

2 bình luận về “10, ( -2 )- -5/8 11, 1/-8 – -5/9 12, 4/13 – -(-12)/39 13, -( -1)/21 – 1/28 14, -3/29 – 16/58 15, 8/40 – –”

  1. 10, (-2) – (-5/8)
    = -2 + 5/8
    = -16/8 + 5/8
    = -11/8
    —
    11, 1/-8 – (-5/9)
    = -1/8 + 5/9
    = -9/72 + 40/72
    = 31/72
    —
    13, -(-1)/21 – 1/28
    = 1/21 – 1/28
    = 4/84 – 3/84
    = 1/84
    —
    14. -3/29 – 16/58
    = -3/29 – 8/29
    = -11/29
    —
    15, 9/40 – (-36)/45
    = 9/40 + 36/45
    = 9/40 + 4/5
    = 9/40 + 32/40
    = 41/40
    —
    16, -8/18 – (-15/27)
    = -4/9 + 5/9
    = 1/9
    —
    17, 13/30 – (-1/5)
    = 13/30 + 6/30
    = 19/30
    —
    18, 2/21 – 1/28
    = 1/21 – 1/28
    = 4/84 – 3/84
    = 1/84
    —-
    19, 5 – (-3/4)
    = 5 + 3/4
    = 20/4 + 3/4
    = 23/4
    —
    20, 18/14 – 35/-10
    = 18/14 + 7/2
    = 18/14 + 49/14
    = 67/14

    Trả lời
  2. 10) (-2 )-(-5/8)=-11/8
    11) 1/-8-(-5/9)=31/72
    12) 4/13-  -(-12/39)=0
    13) -(-1/21)-1/28=1/84
    14) -3/29-16/58=-11/29
    15) 8/40-(-36/45)=1
    16) -8/18-(-15/27)=1/9
    17) 13/30-(-1/5)=19/30
    18) 2/21-1/28=5/84
    19) 5-(-3/4)=23/4
    20) 18/14-(35/-10)=67/14
    ~~Hok tốt nha~~
     

    Trả lời

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