Num lock. The Num Lock key exists because earlier 84-key IBM PC keyboards did not have cursor control or arrows separate from the numeric keypad. Most earlier computer keyboards had separate number keys and cursor control keys; however, to reduce cost, IBM chose to combine the two in their early PC keyboards.
The most common rule. The most common and frequently used rule for writing numbers in APA style is determined by whether the number is under 10. All those numbers should be written out in word form, such as four or seven. A number 10 and above is written as a numeral, such as 10, 17, 233.
Rule 7. Write decimals using figures. As a courtesy to readers, many writers put a zero in front of the decimal point. Examples: The plant grew 0.79 inches last year. The plant grew only 0.07 inches this year. Rule 8. When writing out a number of three or more digits, the word and is not necessary.However, use the word and to express any decimal points that may accompany these numbers. Examples: one thousand one hundred fifty-four dollars one thousand one hundred fifty-four dollars and sixty-one cents.t is not necessary to use a decimal point or a dollar sign when writing out sums of less than a dollar. Not Advised: He had only $0.60. Better: He had only sixty cents. OR. He had only 60 cents. Rule 4a. For clarity, use noon and midnight rather than 12:00 PM and 12:00 AM.