Where do I add Parenthesis'? (Math Question)?

Question

On these:

(Read carefully, some of the problems are only one number different)

To get it to equal 22;

24/8-2+6+3

To equal -21;

24/8-2+6+3

To equal 22;

24/8-2+6x3

To equal 21;

24/8-2+6x3

Answer 1

im ion 7th grade and i did that just a few days ago but it was hard so sorry good luck!

Answer 2

I don't think its possible

Answer 3

You have to experiment using trial and error. Place the parentheses in all possible positions and then calculate the answer for that combination.

I will work the last two for you to show you how to do this.

Remember PEDMAS

Parentheses

Exponents

Division and Multiplication from left to right

Addition and Subtraction from left to right

24 / (8 - 2) + 6 x 3 = ? (do subtraction first)

24 / 6 + 6 x 3 (division then multiplication left to right)

4 + 18 (finally, addition)

22

24 / 8 - (2 + 6) x 3 = ? (do addition first)

24/8 - (8) x 3 (division then multiplication left to right)

3 - 24 (finally, subtraction)

-21

24 / 8 - 2 + (6 x 3) = ? (do multiplication first)

24/8 - 2 + 18 (division is next)

3 - 2 + 18 (now subtraction then addition from left to right)

19

24 / (8 - 2) + (6 x 3) = ? (do subtraction then multiplication)

24 / (6) + 18 (do division next)

4 + 18 (finally, addition)

22

24 / (8 - 2 + 6) x 3 = ? (do subtraction then addition)

24 / 12 x 3 (do division then multiplication)

6

(((24 / 8) - 2) + 6) x 3 = ? (do division)

(((3) - 2) + 6) x 3 (then subtraction)

((1) + 6) x 3 (then addition)

(7) x 3 (then multiplication)

21

Now you figure out the first two using the same method.