Approximation


Direction: What approximate value should come in place of the question mark(?) in the following question ? (Note that you are not expected to calculate the exact value).

  1. 26.823 x 27.923 x 4.5001 = ?
    1. 3500
    2. 3450
    3. 3100
    4. 3400

  1. View Hint View Answer Discuss in Forum

    26.823 x 27.923 x 4.5001
    ≈ 27 x 28 x 4.5000

    Correct Option: D

    26.823 x 27.923 x 4.5001
    ≈ 27 x 28 x 4.5000 = 756 x 4.5000 = 3402 ≈ 3400


  1. 3739 + 164 x 27 = ?
    1. 105400
    2. 4000
    3. 8200
    4. 690

  1. View Hint View Answer Discuss in Forum

    3739 + 164 x 27 = ?
    ? = 3739 + 4428 = 8167

    Correct Option: C

    3739 + 164 x 27 = ?
    ? = 3739 + 4428 = 8167 ≈ 8200



  1. 21 + 3.7 x 2.9 = ?
    1. 74
    2. 70
    3. 27
    4. 32

  1. View Hint View Answer Discuss in Forum

    21 + 3.7 x 2.9 = ?
    ? ≈ 21+ 4 x 3

    Correct Option: D

    21 + 3.7 x 2.9 = ?
    ? ≈ 21+ 4 x 3 ≈ 21 + 12 ≈ 33 ≈ 32


  1. (21 + 99) x (30 - 19.02) = ?
    1. 3581
    2. 131
    3. 1290
    4. None of these

  1. View Hint View Answer Discuss in Forum

    (21+ 99) x (30 - 19.02)
    ≈(21+ 99 ) x (30 - 19)

    Correct Option: D

    (21+ 99) x (30 - 19.02)
    ≈ (21+ 99 ) x (30 - 19)
    ≈ 120 x 11 = 1320



  1. 198.001 x 25 + 112.05 x 24.998 = ?
    1. 7570
    2. 7550
    3. 7500
    4. 7750

  1. View Hint View Answer Discuss in Forum

    ? = 198.001 x 25 + 112.05 x 24.998
    = 198 x 25 + 112 x 25

    Correct Option: D

    ? = 198.001 x 25 + 112.05 x 24.998
    = 198 x 25 + 112 x 25
    = 25(198 + 112)
    = 25 x 310 = 7750