Multiplying
and
Dividing
100
(2.2 × 105 )(4 × 107 )
8.8 x 1012
100
35,000 ⋅ 9,000,000,000
3.15 x 1014
100
(8.1 × 1012)(5.3 × 10)
4.293 x 1014
200
(6.5 × 10−13)(2 × 10−4 )
1.3 x 10-16
200
2.25 x 10-5
200
1.4 x 107
300
If Saturn has a mass of about 569,600,000,000,000,000,000,000,000 kg and Mars has a mass of 640,000,000,000,000,000,000,000 kg, how many times as big is Saturn than Mars? Write your answer in scientific notation. (page 99 #7)
8.9 x 102
300
The diameter of the sun is approximately 1.4 × 109 km and the diameter of Earth is approximately 1.28 × 104 km. About how many times Earth’s diameter is the sun’s diameter?
1.09 x 105
300
Brigitte simplified the expression (7.4 × 106 ) ÷ (5 × 10−2 ) as 1.48 × 108 . Do you agree with her answer? Explain your reasoning.
Yes. 6 - (-2) = 6 + 2
400
Neptune is 4.9 × 109 km from the sun and light travels at a speed of 3 × 105 km/s. In seconds, how long does it take for sunlight to reach Neptune? Write your answer in scientific notation.
1.63 x 104
400
The speed of light is 3 × 108 m/s and the distance from Earth to the sun is 1.5 × 1011 m. How many seconds does it take for sunlight to reach Earth? Write your answer in scientific notation.
5 x 102 seconds
400
When multiplying two numbers in scientific notation, which of the following statements is true?
A. Add the exponents.
B. Subtract the exponents.
C. The exponents must be the same.
D. The exponents must be different.
A. Add the exponents