Job Info 1, Lvl. 2 Lesson 5

Kilo
Explanation: The prefix k" is used to denote multiplication by one thousand. Thus, "k" is short for "kilo," which is the SI prefix for one thousand. For example, if you see the prefix "k" in front of a number, you know to multiply that number by one thousand. So, if you see the prefix "k" in front of the number "5," you would multiply 5 by one thousand to get 5,000."

0,001
Explanation: When the prefix milli is used, it means multiply the number by 1,000.

Divide / prefix
Explanation: When converting from a whole number to a prefixed number, the whole number is divided by the value of the prefix.

Multiply / divide
Explanation: When converting from one prefixed number to another, the number being converted is first multiplied by the value of the prefix it currently has. For example, if you were converting from kilo- (k) to milli- (m), you would multiply the number by 1,000. This number is then divided by the value of the prefix to which you are converting. In the example above, this number would be divided by 1,000,000.

0.00125 MV

17,000 micro amps

0.06345 GHz; 63,450 kHz

0.03025 micro Seconds

0.005 farad

4,700 mh

0.025 kA

30,000,000,000
Explanation: 6 x 10_6 = 6,000,0005 x 10_3 = 5,0006,000,000 x 5,000 = 30,000,000,000

90
Explanation: The first step is to change the 4.5 x 10_-3 to powers of 10. This can be done by moving the decimal point 3 places to the left, which gives us .045. The next step is to change the 2 x 10_4 to powers of 10. This can be done by moving the decimal point 4 places to the right, which gives us 20000. The final step is to multiply .045 and 20000, which gives us 900.

1,2
Explanation: 6 x 10_6 is 6 with 6 zeroes after it, or 600,000. 5 x 10_3 is 5 with 3 zeroes after it, or 5,000. To divide these numbers, we move the decimal point in 600,000 to the left 6 places, so it becomes 6, and move the decimal point in 5,000 to the left 3 places, so it becomes 0.5. 6 divided by 0.5 is 12. So, (6 x 10_6) / (5 x 10_3) is 12.

0,00000225
Explanation: The division can be rewritten as follows:(4.5 x 10^-3) / (2 x 10^3)Which can be further rewritten as:0.45 / 2000The answer can be simplified to:0.000225

12,000.0
Explanation: 6.65 x 10_3 + 5.35 x 10_3= (6.65 + 5.35) x 10_3= 12 x 10_3= 1.2 x 10_4

4,000,000.0
Explanation: 3.455 x 10_6 = 3,455,0005.45 x 10_5 = 545,0003,455,000 + 545,000 = 3,999,999

61,150.0
Explanation: To subtract using powers of 10, you need to line up the decimal points and subtract the numbers as if they were regular numbers. In this case, you would subtract 5.35 from 6.65 to get 1.30. Then, you need to count the number of digits to the right of the decimal point in the original numbers. In this case, there are 3 digits to the right of the decimal point in 5.35 and 4 digits to the right of the decimal point in 6.65. This means that the final answer will have 1 digit to the right of the decimal point. Therefore, the final answer is 1.30 x 10_3.