请你选用下面2 4 7 8四张扑克牌上的数,用“加 减 乘 除”和( )组成算式,使计算结果等于24.

1个回答

  • 1:(2 × 7 - 8) × 4

    2:((2 × 7) - 8) × 4

    3:4 × (2 × 7 - 8)

    4:4 × ((2 × 7) - 8)

    5:4 × (7 × 2 - 8)

    6:4 × ((7 × 2) - 8)

    7:4 × 7 - 8 ÷ 2

    8:(4 × 7) - 8 ÷ 2

    9:4 × 7 -(8 ÷ 2)

    10:(4 × 7) - (8 ÷ 2)

    11:(7 × 2 - 8) × 4

    12:((7 × 2) - 8) × 4

    13:7 ÷ 2 × 8 - 4

    14:(7 ÷ 2) × 8 - 4

    15:(7 ÷ 2 × 8) - 4

    16:((7 ÷ 2) × 8) - 4

    17:(7 ÷ (2 ÷ 8)) - 4

    18:7 ÷ (2 ÷ 8) - 4

    19:7 × 4 - 8 ÷ 2

    20:(7 × 4) - 8 ÷ 2

    21:7 × 4 -(8 ÷ 2)

    22:(7 × 4) - (8 ÷ 2)

    23:7 × 8 ÷ 2 - 4

    24:(7 × 8) ÷ 2 - 4

    25:(7 × 8 ÷ 2) - 4

    26:((7 × 8) ÷ 2) - 4

    27:(7 × (8 ÷ 2)) - 4

    28:7 × (8 ÷ 2) - 4

    29:8 ÷ 2 × 7 - 4

    30:(8 ÷ 2) × 7 - 4

    31:(8 ÷ 2 × 7) - 4

    32:((8 ÷ 2) × 7) - 4

    33:(8 ÷ (2 ÷ 7)) - 4

    34:8 ÷ (2 ÷ 7) - 4

    35:8 × 7 ÷ 2 - 4

    36:(8 × 7) ÷ 2 - 4

    37:(8 × 7 ÷ 2) - 4

    38:((8 × 7) ÷ 2) - 4

    39:(8 × (7 ÷ 2)) - 4

    40:8 × (7 ÷ 2) - 4