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  • 用4、5、9、7算24點(diǎn)

    用4、5、9、7算24點(diǎn)
    詳解
    數(shù)學(xué)人氣:815 ℃時(shí)間:2019-10-06 08:51:41
    優(yōu)質(zhì)解答
    1:4 × 9 -(5 + 7)
    2:(4 × 9) - (5 + 7)
    3:4 × 9 - 5 - 7
    4:(4 × 9) - 5 - 7
    5:(4 × 9 - 5) - 7
    6:((4 × 9) - 5) - 7
    7:4 × 9 -(7 + 5)
    8:(4 × 9) - (7 + 5)
    9:4 × 9 - 7 - 5
    10:(4 × 9) - 7 - 5
    11:(4 × 9 - 7) - 5
    12:((4 × 9) - 7) - 5
    13:4 × 7 + 5 - 9
    14:(4 × 7) + 5 - 9
    15:(4 × 7 + 5) - 9
    16:((4 × 7) + 5) - 9
    17:4 × 7 +(5 - 9)
    18:(4 × 7) + (5 - 9)
    19:4 × 7 - 9 + 5
    20:(4 × 7) - 9 + 5
    21:(4 × 7 - 9) + 5
    22:((4 × 7) - 9) + 5
    23:4 × 7 -(9 - 5)
    24:(4 × 7) - (9 - 5)
    25:5 + 4 × 7 - 9
    26:(5 + 4 × 7) - 9
    27:(5 + (4 × 7)) - 9
    28:5 + (4 × 7) - 9
    29:5 + (4 × 7 - 9)
    30:5 + ((4 × 7) - 9)
    31:5 - 9 + 4 × 7
    32:(5 - 9) + 4 × 7
    33:5 - 9 +(4 × 7)
    34:(5 - 9) + (4 × 7)
    35:5 - (9 - 4 × 7)
    36:5 - (9 - (4 × 7))
    37:5 - 9 + 7 × 4
    38:(5 - 9) + 7 × 4
    39:5 - 9 +(7 × 4)
    40:(5 - 9) + (7 × 4)
    41:5 - (9 - 7 × 4)
    42:5 - (9 - (7 × 4))
    43:5 + 7 × 4 - 9
    44:(5 + 7 × 4) - 9
    45:(5 + (7 × 4)) - 9
    46:5 + (7 × 4) - 9
    47:5 + (7 × 4 - 9)
    48:5 + ((7 × 4) - 9)
    49:(5 × (7 - 4)) + 9
    50:5 × (7 - 4) + 9
    51:9 × 4 -(5 + 7)
    52:(9 × 4) - (5 + 7)
    53:9 × 4 - 5 - 7
    54:(9 × 4) - 5 - 7
    55:(9 × 4 - 5) - 7
    56:((9 × 4) - 5) - 7
    57:9 - (4 - 7) × 5
    58:9 - ((4 - 7) × 5)
    59:9 × 4 -(7 + 5)
    60:(9 × 4) - (7 + 5)
    61:9 × 4 - 7 - 5
    62:(9 × 4) - 7 - 5
    63:(9 × 4 - 7) - 5
    64:((9 × 4) - 7) - 5
    65:9 - (5 × (4 - 7))
    66:9 - 5 ×(4 - 7)
    67:9 + (5 × (7 - 4))
    68:9 + 5 ×(7 - 4)
    69:(9 - 5) × 7 - 4
    70:((9 - 5) × 7) - 4
    71:9 + (7 - 4) × 5
    72:9 + ((7 - 4) × 5)
    73:(7 - 4) × 5 + 9
    74:((7 - 4) × 5) + 9
    75:7 × 4 + 5 - 9
    76:(7 × 4) + 5 - 9
    77:(7 × 4 + 5) - 9
    78:((7 × 4) + 5) - 9
    79:7 × 4 +(5 - 9)
    80:(7 × 4) + (5 - 9)
    81:7 × 4 - 9 + 5
    82:(7 × 4) - 9 + 5
    83:(7 × 4 - 9) + 5
    84:((7 × 4) - 9) + 5
    85:7 × 4 -(9 - 5)
    86:(7 × 4) - (9 - 5)
    87:(7 × (9 - 5)) - 4
    88:7 × (9 - 5) - 4
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