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Home › Grade8 › OLYMPIAD › Math Olympiad-Grade-8 › Decimal Fractions › Decimal Fractions Worksheet-2

Decimal Fractions Worksheet-2

Decimal Fractions Worksheet-2

 

  1. The value of (1 + .1 + .01 + .001) is :

(a) 1.001            (b) 1.011             (c) 1.003            (d) 1.111

 

  1. 34.95 + 240.016 + 23.98 = ?

(a) 298.0946    (b) 298.111        (c) 298.946       (d) 299.09

 

  1. 617 + 6.017 + 0.617 + 6.0017 = ?

(a) 6.2963         (b) 62.965         (c) 629.6357     (d) None of these

 

  1. 48.95 – 32.006 = ?

(a) 16.089         (b) 16.35            (c) 16.89            (d) 16.944

 

  1. 792.02 + 101.32 – 306.76 = ?

(a) 586.58         (b) 893.34         (c) 997.11           (d) 1200.10

 

  1. 12.1212 + 17.0005 – 9.1102 = ?

(a) 20.0015       (b) 20.0105       (c) 20.0115        (d) 20.1015

 

  1. 892.7 – 573.07 – 95.007 = ?

(a) 224.623       (b) 224.777       (c) 233.523       (d) 414.637

 

  1. 3889 + 12.952 – ? = 3854.002

(a) 47.095         (b) 47.752          (c) 47.932         (d) 47.95

 

  1. 138.009 + 341.981 – 146.305 = 123.6 + ?

(a) 120.085       (b) 120.85         (c) 220.085       (d) None of these

 

  1. 832.58 – 242.31 = 779.84 – ?

(a) 179.57          (b) 199.57          (c) 295.05          (d) None of these

 

  1. What will come in place of question mark in the following equation ?

54. (?) 3 + 543 + 5.43 = 603.26

(a) 5                    (b) 6                    (c) 8                    (d) None of these

 

  1. Which of the following is equal to 3.14 × 106 ?

(a) 314                (b) 3140             (c) 3140000      (d) None of these

 

  1. The number 518,000,000 when expressed in scientific notation, equals :

(a) 51.8 × 106    (b) 51.8 × 107    (c) 5.18 × 108    (d) 5.18 × 109

 

  1. 0.000006723 when expressed in scientific notation, is :

(a) 6723 × 10–5                             (b) 67.23 × 10–7

(c) 6.723 × 10 –6                           (d) None of these

 

  1. If 1.125 × 10k = 0.001125, then the value of k is :

(a) –4                 (b) –3                 (c) –2                 (d) –1

 

Answer Key:

(1)-d; (2)-c; (3)-c; (4)-d; (5)-a; (6)-c; (7)-a; (8)-d; (9)-d; (10)-d; (11)-c; (12)-c; (13)-c; (14)-c; (15)-b