Page 13 - Math Course 2 (Book 1)

Standard Form and Scientif c Notation

Your Turn!

SPACE Order the numbers 6.21 × 105, 2.35 × 104, 5.95 ×
Use the table to estimate how many times farther 109, and 4.79 × 104 in decreasing order.
Pluto is from the Sun than Earth is from the Sun.

Planet Distance from the sun (km)
A. 2.35 × 104, 4.79 × 104, 6.2¹ × 105,
Mercury 5.80 x 10 7 and 5.95 × 109

Venus 1.03 x 10 8 B. 6.21 × 105, 5.95 × 109, 4.79 × 104,
Earth 1.55 x 10 8 and 2.35 × 104
Mars 2.28 x 10 8
C. 2.35 × 104, 4.79 × 104, 5.95 × 109,
Jupiter 7.78 x 10 8 and 6.21 × 105
Saturn 1.43 x 10 9
D. 5.95 × 109, 6.21 × 105, 4.79 × 104,
Uranus 2.87 x 10 9 and 2.35 × 104
Neptune 4.50 x 10 9
Pluto 5.90 x 10 9
A. 3
B. 30
C. 38
D. 300

Answer Answer

Express each number in scientif c notation.
Skill Practice! 6. 2,450,000

Express each number in standard form.
1. 7.0 x 10 –1
7. 0.000099

2. 6.3 x 10 –3
8. 0.00912

3. 5.83 x 10 –2
Choose the greater number in each pair.
–2
9.1.9 x 10 , 0.02

4. 8.075 x 10 –4

2
10. 8.4 x 10 , 839
5. 1.1 x 10 –5

5