what is the value of the expression?
15-6/3.2+7-1
6/3.2 = 1.875
15 - 1.875 = 13.125
13.125 + 7 = 20.125
20.125 - 1 = 19.125
Answer = 19.125
or, if as josiah interpreted, 3.2 = 3•2, then, since multiplication/division are done left-to-right, we have
15-6/3.2+7-1
15-2•2+7-1
15-4+7-1
17
How important are parentheses!
To find the value of the expression 15 - 6/3.2 + 7 - 1, we will follow the order of operations, also known as PEMDAS:
1. Perform any calculations inside parentheses (none in this case).
2. Evaluate exponents (none in this case).
3. Perform multiplication and division from left to right.
4. Perform addition and subtraction from left to right.
Let's break down the calculation step by step:
Step 1: 6 divided by 3.2 equals 1.875.
The expression becomes:
15 - 1.875 + 7 - 1
Step 2: Perform addition and subtraction from left to right.
15 - 1.875 equals 13.125.
13.125 + 7 equals 20.125.
20.125 - 1 equals 19.125.
Therefore, the value of the expression 15 - 6/3.2 + 7 - 1 is 19.125.