MACHINE SHOP CALCULATION - OD1640 - LESSON 1/TASK 1
Step 3.
Check by adding the answer to the bottom number.
53 + 25 = 78.
d.
Multiplication. A requirement for multiplication is indicated by the
symbol x. The answer to multiplication problems is called the product. To
find the product write the numbers in columns under each other, as in
addition, and proceed as shown in Example 3.
EXAMPLE 3.
Multiply 25 by 3.
Step 1.
Multiply the digits in the ones
position. 3 x 5 = 15. Write the
5 under the ones position and carry
the 1 to the tens position.
Step 2.
Multiply the digit 2 in the tens
column by the digit 3 and add the
digit 1 carried over to the tens
column. 2 x 3 = 6 + 1 = 7.
Step 3.
Check by dividing the product 75
by 3 as explained in the succeeding
paragraph.
e.
Division.
A requirement for division is indicated by the symbol ƒ.
The answer to division problems is called the quotient.
To find the
quotient, proceed as shown in Example 4.
EXAMPLE 4.
Divide 75 by 3.
Step 1.
Divide the digit 7 by the
divisor 3. 7 + 3 = 2. Write the
2 above the 7 in the tens position.
Step 2.
Multiply the divisor 3 by the
digit 2. 3 x 2 = 6. Write the 6
under the 7.
4
Previous Page
