Sign In
Remember to perform multiplication before subtraction.
Remember to evaluate the expression inside the parentheses completely before performing multiplication and addition.
Pay close attention to the order of operations.
- 7
70
7.25
For the given expression, this means performing multiplication before subtraction. 3-2* 5 Let's do it!
| Operation | Before Simplification | After Simplification |
|---|---|---|
| Multiply | 3- 2* 5 | 3- 10 |
| Subtract terms | 3- 10 | - 7 |
We can also evaluate this expression using a calculator. To do so, we type it as shown below.
7(4+3* 2) Notice also that even within this parenthetical expression, we must follow the order of operations. 4+3* 2 Let's do it!
| Operation | Before Simplification | After Simplification |
|---|---|---|
| Multiply | 7(4+ 3* 2) | 7(4+ 6) |
| Add terms | 7( 4+ 6) | 7( 10) |
| Multiply | 7( 10) | 70 |
We can also evaluate this expression using a calculator. To do so, we type it as shown below.
Whenever using a calculator for a complicated expression such as this, be very careful when placing the parentheses. A calculator will only do what it is told to do, not what you meant for it do.
For the given expression, this means performing multiplication before performing division, addition, and subtraction. 10-6Ă· 2* 4+2 Let's do it!
| Operation | Before Simplification | After Simplification |
|---|---|---|
| Multiply | 10-6Ă· 2* 4+2 | 10-6Ă· 8+2 |
| Divide | 10- 6Ă· 8+2 | 10- 0.75+2 |
| Add terms | 10- 0.75+ 2 | 10- 2.75 |
| Subtract terms | 10- 2.75 | 7.25 |
We can also evaluate this expression using a calculator. To do so, we type it as shown below.
