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Home › Grade7 › Grade 7 Olympiad › Math Olympiad-Grade-7 › Calculations › Calculations Worksheet-10

Calculations Worksheet-10

 

Calculations Worksheet-10

 

  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

 

  1. 0.002 × 0.5 = ?

(a) 0.0001         (b) 0.001           (c) 0.01              (d) 0.1

 

  1. 16.02 × 0.001 = ?

(a) 0.001602    (b) 0.01602       (c) 0.1602         (d) 1.6021

 

  1. 0.014 × 0.014 = ?

(a) 0.000196    (b) 0.00196       (c) 19.6               (d) 196

 

  1. 40.83 × 1.02 × 1.2 = ?

(a) 41.64660     (b) 42.479532  (c) 49.97592     (d) 58.7952

 

  1. 0.04 × 0.0162 is equal to :

(a) 6.48 × 10–3                              (b) 6.48 × 10–4

(c) 6.48 × 10–5                              (d) 6.48 × 10–6

 

  1. 3 × 0.3 × 0.03 × 0.003 × 30 = ?

(a) 0.0000243                              (b) 0.000243

(c) 0.00243                                   (d) 0.0243

 

  1. How many digits will be there to the right of the decimal point in the product of 95.75 and .02554 ?

(a) 5                    (b) 6                    (c) 7                    (d) None of these

 

  1. when expressed as a vulgar fraction, equals :

(a)                 (b)              (c)            (d)

 

  1. Which is the closest approximation to the product 0.3333 × 0.25 × 0.499 × 0.125 × 24 ?

(a)                   (b)                   (c)                    (d)

 

Answer Key:

(1)-(d); (2)-(d); (3)-(c); (4)-(c); (5)-(c); (6)-(c); (7)-(b); (8)-(b); (9)-(b); (10)-(a); (11)-(c); (12)-(b); (13)-(c); (14)-(b); (15)-(b); (16)-(a)