whole number system will be

provided,

including

addition,

subtraction,

multiplication, and division.

2.

Review of Whole Numbers

a.

number 2,222, for example, has four digits.

Each digit has a different

value because of its position in the number. Figure 1 provides the names of

the first ten places in the whole number system.

FIGURE 1.

PLACE VALUE OF WHOLE NUMBERS.

Reading from left to right, the first 2 in the number 2,222 has a value of 2

thousands or 2,000.

The second 2 has a value of 2 hundreds or 200. The

third 2 has a value of 2 tens or 20, and the fourth 2 has a value of 2 ones

or 2. The comma makes large numbers easier to read. The number 2,222 would

be read as two-thousand, two-hundred, and twenty-two.

b.

A requirement for addition is indicated by the symbol +.

The answer to addition problems is called the sum or total. To find the sum

or total of two numbers, each one having one or more digits, place each

digit in its corresponding value position under the other.

Put the ones

under the ones, and tens under the tens, and so on. Follow the procedure

shown in Example 1 on the following page.

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