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Home › Grade7 › Grade 7 Olympiad › Math Olympiad-Grade-7 › Powers & Exponents › Exponents and Powers Worksheet-4

Exponents and Powers Worksheet-4

Exponents and Powers Worksheet-4

 

  1. Which of the following is equivalent to 4.5 × 105 ?

(a) 45,000                                      (b) 45,000,000

(c) 450,000                                   (d) 4,500

 

  1. What would be the correct scientific notation for 0.033?

(a) 33 × 10–2     (b) 3.3 × 10–2      (c) 3.3 × 102      (d) 3.3 × 10–3

 

  1. Write 0.00213 × 10–5 in scientific notation.

(a) 21.3 × 10–3                               (b) 2.13 × 10–2

(c) 2.13 × 10–15                              (d) 2.13 × 10–8

 

  1. Which of the following is equivalent to 1.25 × 10–1 ?

(a) 0.0125          (b) 0.125            (c) 12.5               (d) 0.00125

 

  1. Convert 38,500 into scientific notation.

(a) 3.85 × 10–4 (b) 3.85 × 105   (c) 3.85 × 104   (d) 3.85 × 106

 

  1. 2.07 × 107 is same as ______.

(a) 2,700,000                               (b) 20,700,000

(c) 2,070,000                               (d) 200,700,000

 

  1. Convert 24,610,000 into scientific notation.

(a) 24.61 × 108                              (b) 2.461 × 109

(c) 2.461 × 10–7                             (d) 2.461 × 107

 

  1. Find the product : 68 × 105

(a) 6,800,000  (b) 680,000      (c) 6,800           (d) 68,000,000

 

  1. The surface area of Saturn is 43,466,000,000 km2. How do you write this number in scientific notation?

(a) 4.3466 × 1010 km2                (b) 43466 × 1010 km2

(c) 434.66 × 1010 km2                 (d) 4.3466 × 108 km2

 

  1. Write 2.4 × 104 in standard form.

(a) 240,000      (b) 240               (c) 24,000         (d) 24,000,000

 

  1. The speed of light is about 30,000,000,000 cm per sec. How do you write this number in scientific notation?

(a) 30 × 1010     (b) 3 × 10–10      (c) 3 × 109         (d) 3 × 1010

 

  1. Write 1.3 × 107 in standard form.

(a) 130,000                                   (b) 1,300, 000

(c) 130,000,000                           (d) 13,000,000

 

  1. Which option shows 8.026 × 108 in standard form?

(a) 80,260,00                               (b) 802,600,000

(c) 8,026,000                               (d) 802,600

 

  1. The volume of Uranus is 68,330,000,000 km3. How do you express this number in scientific notation?

(a) 68.330 × 1013 km3                 (b) 6.8330 × 10–13 km3

(c) 6.8330 × 1010 km3                 (d) 683.30 × 1010 km3

 

  1. United States of America covers an area of 9,826,630 sq Km. Write this number in scientific notation.

(a) 9.827 × 107 (b) 9.8 × 104     (c) 9.827 × 106 (d) 9.827 × 105

 

  1. The average distance of Venus from the Sun is 108,200,000 km. Write the distance in scientific notation.

(a) 1.08 × 107    (b) 1.08 × 108   (c) 10.8 × 108    (d) 1.08 × 109

 

  1. Which is same as 15 × 106 ?

(a) 1.5 × 107       (b) 0.15 × 106?  (c) 1.5 × 106       (d) 1.5 × 107?

 

  1. 6703.24 × 104

(a) 6,703240                                 (b) 670,324

(c) 67,032,400                             (d) 670,324,000

 

  1. Write 2,370,000 in scientific notation.

(a) 237 × 106     (b) 2.37 × 108   (c) 2.37 × 107    (d) 2.37 × 106

 

  1. Write 0.0564 in scientific notation.

(a) 5.64 × 10–4  (b) 5.64 × 102   (c) 564 × 10–3   (d) 5.64 × 10–2

 

Answer Key:

(1)-(c); (2)-(b); (3)-(d); (4)-(b); (5)-(c); (6)-(b); (7)-(d); (8)-(a); (9)-(a); (10)-(c); (11)-(d); (12)-(d); (13)-(b); (14)-(c); (15)-(c); (16)-(b); (17)-(a); (18)-(c); (19)-(d); (20)-(d)