Fundamentals of Mathematics, 2008a

12 CHAPTER 1. ADDITION AND SUBTRACTION OF WHOLE NUMBERS
In our positional number system, the value of a digit is determined by its position in the number.
1.2.4.1 Sample Set B
Example 1.1
Find the value of 6 in the number 7,261.
Since 6 is in the tens position of the units period, its value is 6 tens.
6 tens = 60
Example 1.2
Find the value of 9 in the number 86,932,106,005.
Since 9 is in the hundreds position of the millions period, its value is 9 hundred millions.
9 hundred millions = 9 hundred million
Example 1.3
Find the value of 2 in the number 102,001.
Since 2 is in the ones position of the thousands period, its value is 2 one thousands.
2 one thousands = 2 thousand
1.2.4.2 Practice Set B
Exercise 1.2.2 (Solution on p. 76.)
Find the value of 5 in the number 65,000.
Exercise 1.2.3 (Solution on p. 76.)
Find the value of 4 in the number 439,997,007,010.
Exercise 1.2.4 (Solution on p. 76.)
Find the value of 0 in the number 108.
1.2.5 Whole Numbers
Whole Numbers
Numbers that are formed using only the digits
0 1 2 3 4 5 6 7 8 9
are called whole numbers. They are
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, . . .
The three dots at the end mean "and so on in this same pattern."
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