Give 2 examples that show how using parentheses can change the order in which operations are performed in an expression

Here is an example,

Kate had a test and one of the questions were 8 dived by 2 +( 6+7)+3. She answered by saying  it was 13.625 . When the teacher graded it she marked it wrong then handed it to Kate saw that it was wrong. She wondered why so she asked the teacher and said why she got it wrong and explained that the parenthesis are show that  you need to solve the number in it first before you do anything else. Then Kate tried to solve it again and got 20.

Hope this helps and sorry it took me long to reply

Khalid and Sue's Height together is 126 Inches. The difference is 6 inches, so therefore you subtract 6 from the total getting you 120 Inches. You do this with all of the problems for example: The first one. Sue is 72 inches and Khalid is 54. Add them together and subtract them by 6 to get your final answer. Please DO NOT quote me on this lol. This is how I read the question. I think this is right but I am not absolutely 100% sure. Hope this helps.