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Post by buddysmom on Feb 21, 2019 5:12:26 GMT
What is the answer to this?? 5-5X5+5 ?
I thought I knew it but I was wrong.
Go!!!
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Post by mikewozowski on Feb 21, 2019 5:16:10 GMT
i am not sure. -15? 5x5 = 25
5-25 = -20
-20+5 = -15 |
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Post by Eddie-n-Harley on Feb 21, 2019 5:17:19 GMT
-15.
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Post by Delta Dawn on Feb 21, 2019 5:18:04 GMT
I failed Algebra 12 twice. I did well in calculus but it nearly killed me!
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Post by mikewozowski on Feb 21, 2019 5:18:59 GMT
^ this is basic math.
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Post by notjstamom on Feb 21, 2019 5:19:29 GMT
-15
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Post by alexa11 on Feb 21, 2019 5:19:33 GMT
You have to multiply first so 5-25 +5, then do addition/subtraction from left to right
5-25 = -20
-20 + 5= -15
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snyder
Pearl Clutcher
Posts: 3,920 
Location: Colorado
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Post by snyder on Feb 21, 2019 5:21:35 GMT
-15
Multiply and divide first, so you have 25; so then it is 5 - 25 = -20; then you add 5, which ends up being -15.
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Post by papersilly on Feb 21, 2019 5:24:16 GMT
-15
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Post by buddysmom on Feb 21, 2019 5:28:43 GMT
OK, you guys are right. Negative 15.
Need to look up my fourth grade math teacher who said the order of operations was MDAS and let her know (My Dear Aunt Sally). But she's about 110 now...
My kids jumped on me and said that add and subtract are on the same level.
Geez, even the stuff I "thought" I knew--well I don't...
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artsydaisy
Full Member
Posts: 464
Jul 1, 2014 4:55:48 GMT
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Post by artsydaisy on Feb 21, 2019 5:49:12 GMT
buddysmom, your math teacher was right though. Please Excuse My Dear Aunt Sally, parentheses, exponents, multiplication, division, addition, subtraction. That expression didn't have parentheses or exponents, so you do all of the multiplication first (5×5), then addition and subtraction from left to right.
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Post by crimsoncat05 on Feb 21, 2019 14:26:27 GMT
-15
multiplication is done first, I think...
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seaexplore
Prolific Pea
Posts: 8,395
Apr 25, 2015 23:57:30 GMT
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Post by seaexplore on Feb 21, 2019 14:39:09 GMT
-15
Says the middle school math teacher. 😁
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Post by littlemama on Feb 21, 2019 17:18:20 GMT
Since there are no parentheses, it is -15.
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Deleted
Posts: 0
Apr 19, 2024 11:52:48 GMT
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Post by Deleted on Feb 21, 2019 17:22:07 GMT
-15. Surprisingly, I did it correctly.  |
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Post by workingclassdog on Feb 21, 2019 17:25:32 GMT
According to Google -15  Math was NOT my subject.. AT ALL.. this is not basic math (for me)... |
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artsydaisy
Full Member
Posts: 464
Jul 1, 2014 4:55:48 GMT
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Post by artsydaisy on Feb 21, 2019 18:34:48 GMT
I think I figured out what you had a problem with, OP. Addition and subtraction (and separately multiplication and division) are done at the same time, from left to right. I forget the technical term for it but they are the same type of operation (inverse? something like that). PEMDAS is to remind you that multiplication and division go before addition and subtraction.
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MsKnit
Pearl Clutcher
RefuPea #1406
Posts: 2,648
Jun 26, 2014 19:06:42 GMT
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Post by MsKnit on Feb 21, 2019 20:56:21 GMT
I think I figured out what you had a problem with, OP. Addition and subtraction (and separately multiplication and division) are done at the same time, from left to right. I forget the technical term for it but they are the same type of operation (inverse? something like that). PEMDAS is to remind you that multiplication and division go before addition and subtraction. Instead of thinking of it like PEMDAS, it should be: PE MD AS The top two operations--Parentheses, Exponents--are done left to right. Next, Multiplication and Division, left to right Followed by Addition and Subtraction, left to right |
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Post by christine58 on Feb 21, 2019 21:16:35 GMT
Need to look up my fourth grade math teacher who said the order of operations was MDAS and let her know (My Dear Aunt Sally). You or her forgot Please Excuse (PEMDAS) |
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artsydaisy
Full Member
Posts: 464
Jul 1, 2014 4:55:48 GMT
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Post by artsydaisy on Feb 21, 2019 22:09:40 GMT
I think I figured out what you had a problem with, OP. Addition and subtraction (and separately multiplication and division) are done at the same time, from left to right. I forget the technical term for it but they are the same type of operation (inverse? something like that). PEMDAS is to remind you that multiplication and division go before addition and subtraction. Instead of thinking of it like PEMDAS, it should be: PE MD AS The top two operations--Parentheses, Exponents--are done left to right. Next, Multiplication and Division, left to right Followed by Addition and Subtraction, left to right Yeah, now that you wrote it like that I realize that we should campaign to change it to an almost haiku: Please Excuse My Dear Aunt Sally haha! |
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Post by jemmls4 on Feb 22, 2019 1:33:58 GMT
-15.
multiplication first, then addition and subtraction. It's the same as 5 - (5x5) + 5.
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