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Chapter 2: Q. 4 (page 84)

Evaluate the expression. Justify each of your steps.

5鈭�7鈭�12

Short Answer

Expert verified

The value of the expression is420.

Step by step solution

01

Step 1.  Order of operations

To evaluate any expression involving more than one operation, follow the below order of operations:

  • First evaluate expressions inside grouping symbols like parentheses ( ) or brackets [ ].
  • Evaluate the exponents.
  • Perform Multiplication and division from left to right.
  • Perform addition and subtraction from left to right.
02

Step 2.  Multiply from left to right

To evaluate the given expression5-7-12, first multiply the two numbers from left to right and then multiply the resulting number with the last number as shown below

5鈭�7鈭�12=鈭�5鈰�7鈭�12=鈭�35鈭�12=鈭�35鈭�12

03

Step 3.  Multiply the numbers

Now to simplify further, multiply the resulting number with the last number to get

5鈭�7鈭�12=鈭�35鈭�12=+35鈰�12=420

Thus, the value of the expression is 420.

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