Question

10. Reasoning Find the value of 12 +9+3+82-3³. Then change twooperation signs so that the value of the expression is-22.

Answer 1

We are given the following operation:

`12+9/3+8^2-3^3`

First, we will solve the exponents:

`12+9/3+8^2-3^3=12+9/3+64-27`

Now, we solve the division:

`12+9/3+64-27=12+3+64-27`

Now, we solve the addition and subtraction:

`12+3+64-27=52`

Therefore, the result of the operation is 52.

Now, we will change the last plus sing for a minus sign and the last minus sign for a plus sign:

`12+9/3-8^2+3^3`

Now, we solve the exponents:

`12+9/3-64+27`

Now, we solve the division:

`12+3-64+27`

Solving the addition and subtraction we get:

`-22`

And thus we have solved the operation with a final result of -22.