# Free Compass Math Practice on Scientific Notation - Sample 16

 A set of questions, with answers, on scientific notation. The answers to the questions are at the bottom of the page. These questions are similar to those in the compass math test. Which of the following scientific notations is equivalent to 510,000 A) 5.1 × 104 B) 5.1 × 10-5 C) 5.1 × 106 D) 5.1 × 10-6 E) 5.1 × 105 In scientific notation 100,000 + 3,000,000 = A) 3.1 × 106 B) 3.1 × 107 C) 3.1 × 108 D) 3.0 × 106 E) 3.1 × 107 Which of the following scientific notation is equivalent to 0.0000028? A) 2.8 × 106 B) 2.8 × 10-5 C) 2.8 × 10-6 D) 2.8 × 10-4 E) 2.8 × 105 1.2 × 106 = A) 120,000 B) 12,000,000 C) 12,000 D) 1,200,000 E) 0.0000012 2.3 × 10-5 = A) 230,000 B) 0.000023 C) 0.00023 D) 0.0023 E) 2,300,000 In scientific notation 1/10,000 + 2/1000,000 = A) 1.02 × 10-5 B) 1.0 × 10-4 C) 1.02 × 10-6 D) 1.0 × 10-5 E) 1.02 × 10-4 2.1 × 10-5 + 3.0 × 10-4 = A) 0.000321 B) 0.00321 C) 321 D) 0.0321 E) 3.21 In scientific notation 1.2 × 10-6 + 0.0000006 = A) 1.2 × 10-6 B) 1.8 × 10-5 C)1.8 × 10-6 D) 1.8 × 10-7 E) 1.8 × 10-8 2.1 × 10-6 + 3.2 × 10-5 A) 5.3 × 10-5 B) 2.42 × 10-5 C) 5.33 × 10-5 D) 3.41 × 10-6 E) 3.41 × 10-5 5.9 × 10-6 - 2.0 × 10-7 A) 5.7 × 10-7 B) 5.7 × 10-6 C) 3.9 × 10-6 D) 7.9 × 10-6 E) 5.7 × 10-5