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222-9+11+12:2*14+14 = ? ( )

Toán Lớp 6: a;11/8vs15/6.b;17/12vs23/5.c;2/7vs8/13.d;6/10vs15/31.e;-2/3vs4/7.f;-5/-6vs-1/2.g;14/8vs2/3 so sánh nha mn cảm ơn

Toán Lớp 6: a;11/8vs15/6.b;17/12vs23/5.c;2/7vs8/13.d;6/10vs15/31.e;-2/3vs4/7.f;-5/-6vs-1/2.g;14/8vs2/3
so sánh nha mn cảm ơn

Comments ( 2 )

  1. a)11/8<15/6.
    Gỉai thích: 11/8=1.375 < 15/6=2.5
    b;17/12<23/5.
    Gỉai thích: 17/12=1,4…<23/5=4.6
    c;2/7<8/13.
    giải thích: 2/7≈0.3<8/13=0.6…
    d;6/10>15/31.
    giải thích: 6/10=0.6>15/31≈0.5
    e;-2/3<4/7.
    giải thích:-2/3= -0.66…<4/7=≈0,6
    f;-5/-6>-1/2.
    giải thích : -5/-6=0.83.. > -1/2=-0.5
    g;14/8>2/3
     giải thích :  14/8=1.75 > 2/3=0.66….

  2. a)
    11/8 = 66/48
    15/6 = 120/48
    Vì  66/48 < 120/48
    ⇒ 11/8 < 15/6
    b)
    17/12 = 85/60
    23/5 = 276/60
    Vì  85/60 < 276/60
    ⇒ 17/12 < 23/5
    c)
    2/7 = 26/91
    8/13 = 56/91
    Vì  26/91 < 56/91
    ⇒ 2/7 < 8/13
    d)
    6/10 = 186/310
    15/31 = 150/310
    Vì  186/310 > 150/310
    ⇒ 6/10 > 15/31
    e)
    -2/3 < 4/7
    text(Vì -2/3 là số âm)
    f)
    (-5)/(-6) = 5/6 > (-1)/2
    text(Vì -1/2 là số âm)
    ⇒ (-5)/(-6) > (-1)/2
    g)
    14/8 = 7/4 = 21/12
    2/3 = 8/12
    Vì  21/12 > 8/12
    ⇒ 14/8 > 2/3

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222-9+11+12:2*14+14 = ? ( )