Practice Math Problems
1. How many centimeters are in a 25 meters?
a) .25 cm
b) 2.5 cm
c) 250 cm
d) 2,500 cm
e) 25,000 cm
2. How would you most properly express 34,000,000 in scientific notation?
a) 34 x 106
b) 3.4 x 106
c) 34 x 107
d) 3.4 x 107
e) 340 x 105
3. The moon is Earth’s closest neighbor in space and it’s only natural satellite. The moon has an average
orbital speed of approximately 1.0 x 103 m/s. If the mass of the moon is 7.35 x 1022 kg, calculate its
momentum in kg*m/s using the equation momentum = mass x speed.
a) 7.35 x 1025
b) 7.35 x 1022
c) 7.35 x 1019
d) 8.35 x 1025
e) 8.35 x 1022
4. 4.268/ 2 =
5. 6. 84/ 2.40 =
6. 5,000,000 x 3,500,000 = (please answer in scientific notation)
7. What is the current world population? Please write in scientific notation and the full number.
8. 3.456 x 20.54=
1.
2.
3.
4.
5.
6.
7.
8.
D
D
A
2.134
2.85
(5 x 10^6)(3.5 x 10^6)= 1.75 x 10^7
7.1 billion, 7,000,000,000, 7.1 x 10 ^9
70.98624