Lesson 1: Working with Prefixes and Powers of 10

7.5 x 10^-3

0.0075

1 x 10^0

1

1 x 10^3

1,000

1 x 10^1

10

1 x 10^2

100

2.5 x 10^3

2,500

6.7 x 10^6

6,700,000

Which of the numbers below correctly describes 1,250 volts? a. 0.00125 MV b. 0.125 MV c. 1.25 MV d. 1,250 MV

a. 0.00125 MV

Which of the numbers below correctly describes 5,000 µf? a. 0.005 farad b. 0.05 farad c. 50 mf d. 5 farad

a. 0.005 farad

Which of the numbers below correctly describes 25 A? a. 0.025 kA b. 0.25 kA c. 25,000 µA d. 2,500 mA

a. 0.025 kA

Which of the numbers below correctly describes 30.25 ns? a. 0.03025 µSec b. 0.03025 mSec c. 3.0250 pSec d. 302,500 pSec

a. 0.03025 µSec

Which of the numbers below correctly describes 4.7 h? a. 4,700 mh b. 4,700,000 ph c. 0.47 kh d. 4,700

a. 4,700 mh

Multiply the following using powers of 10. Change to powers of 10 where necessary. Show answers in decimal form. (4.5 × 10-3) × (2 × 104) a. 90 b. 900 c. 9,000 d. 90,000

a. 90

Divide the following using powers of 10. (4.5 × 10−3) ÷ (2 × 103) a. 0.000000225 b. 0.00000225 c. 0.0000225 d. 0.000225

b. 0.00000225

Divide the following using powers of 10. (6 × 106) ÷ (5 × 103) a. 120 b. 1,200 c. 12,000 d. 120,000

b. 1,200

Multiply the following using powers of 10. Change to powers of 10 where necessary. Show answers in decimal form. (6 × 106) × (5 × 103) a. 3,000,000,000 b. 30,000,000,000 c. 300,000,000,000 d. 3,000,000,000,000

b. 30,000,000,000

When converting from a whole number to a prefixed number, ? the whole number by the value of the ? . a. add / prefix b. divide / prefix c. multiply / prefix d. multiply / suffix

b. divide / Prefix

When the prefix milli is used, it means multiply the number by ? . a. 0.1 b. 0.01 c. 0.001 d. 1,000

c. 0.001

Add the following using powers of 10.(6.65 × 103) + (5.35 × 103) a. 120 b. 1,200.0 c. 12,000.0 d. 120,000.0

c. 12,000.0

Subtract using powers of 10. (6.65 × 104) − (5.35 × 103) a. 611.5 b. 6,115.0 c. 61,150.0 d. 611,500.0

c. 61,150.0

When the prefix ? is used, it means multiply the number by 1,000. a. deka b. hecto c. kilo d. milli

c. Kilo

Which of the numbers below correctly describes 63.45 Mhz? a. 0.06345 Ghz b. 63,450 khz c. Both a and b d. None of the above

c. both A and B

Which of the numbers below correctly describes 17 mA? a. 0.17 mA b. 0.17 A c. 0.0017 kA d. 17,000 µA

d. 17,000 µA

Add the following using powers of 10.(3.455 × 106) + (5.45 × 105) a. 4,000.0 b. 40,000.0 c. 400,000.0 d. 4,000,000.0

d. 4,000,000.0

When converting from one prefixed number to another, ? the number by the value of the first prefix and ? that value by the value of the prefix to which you are converting. a. divide / add b. divide / multiply c. multiply / add d. multiply / divide

d. multiply / divide

1 x 10^1

deka

1 x 10^2

hecto

1 x 10^3

kilo

1 x 10^6

mega

1 x 10^-3

milli

1 x 10^0

unit