MACHINE SHOP CALCULATION - OD1640 - LESSON 1/TASK 1
whole number system will be
provided,
including
addition,
subtraction,
multiplication, and division.
2.
Review of Whole Numbers
a.
Definition. Whole numbers are made up of the digits 0 through 9. The
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.
Addition.
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.
2
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