Number and Number Sense, Scientific Notation, Add, Subtract, Multiply and Divide, Math online test for Grade 8 at myTestBook.com

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<< back	This is a SAMPLE test for Grade: 8, Subject: Math
	Test Topic(s): Number and Number Sense, Scientific Notation, Add, Subtract, Multiply and Divide

Question 1:

5.67 × 10 ⁷ + 7.34 × 10 ⁷ = ?

13.0 × 10 ⁸

13.01 × 10 ¹⁴

1.301 × 10 ⁸

1.301 × 10 ⁷

Question 2:

8.548 × 10 ¹⁵ − 2.224 × 10 ¹⁵ = ?

6.324 × 10 ¹⁵

5.324 × 10 ¹⁵

6,324 × 10 ¹⁴

6.024 × 10 ⁰

Question 3:

(4 × 10 ⁴) × (2 × 10 ³) = ?

8 × 10 ⁷

6 × 10 ⁷

8 × 10 ¹²

8 × 10 ¹

Question 4:

(6 × 10 ⁵) ÷ (2 × 10 ²) = ?

8 × 10 ⁵

3 × 10 ¹⁰

3 × 10 ^2.5

3 × 10 ³

Question 5:

2.55 × 10 ⁷ + 50,000,000 = ?

7.55 × 10 ⁷

3.05 × 10 ⁷

2.555 × 10 ⁷

2.60 × 10 ⁷

Question 6:

2.55 × 10 ⁷ − 10,000,000 = ?

2.551 × 10 ⁷

1.55 × 10 ⁷

2.54 × 10 ⁷

2.45 × 10 ⁷

Question 7:

(4 × 10 ⁴) × 1,000 = ?

4 × 10 ⁷

400 × 10 ⁷

4 × 10 ⁸

4 × 10 ⁶

Question 8:

(8.4 × 10 ⁸) ÷ 10,000 = ?

8.0 × 10 ⁸

4.4 × 10 ⁸

8.4 × 10 ⁴

8.4 × 10 ²

Question 9:

Weight of the Earth is 5.9736 × 10 ²⁴ Kg. Mass of the Venus is 4.8685 × 10 ²⁴ Kg. What is the combined weight of the Earth and Venus?

10.8421 × 10 ²⁶ Kg

10.8421 × 10 ²³ Kg

1.08421 × 10 ²⁵ Kg

10.8421 × 10 ²⁵ Kg

Question 10:

Planet Venus is 1.08 × 10 ⁸ Km away from the Sun and Planet Mercury is 5.79 × 10 ⁷ Km from the Sun. How much farther away is the planet Venus from the Sun as compared to the planet Mercury?

6.21 × 10 ⁷ Km

5.01 × 10 ⁸ Km

5.10 × 10 ⁷ Km

5.01 × 10 ⁷ Km

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