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Mathematics 21 Online
OpenStudy (anonymous):

24 + 5 [3 + (-2)5] , help me simplify the expression step by step please.

myininaya (myininaya):

you have grouping symbols so perform what is inside their first in the order of operations, the multiplication comes before the addition

OpenStudy (anonymous):

P E M D A S , I have tried that

myininaya (myininaya):

24+5[ ] /\ | so what goes here after performing the operations inside this brackett

OpenStudy (anonymous):

I keep getting -63 there

myininaya (myininaya):

you have 3+(-2)5 3+(-10) -7 inside the brackett

myininaya (myininaya):

so we have 24+5[-7]

OpenStudy (anonymous):

ok

myininaya (myininaya):

now again multiplication comes before addition so now we have 24+(-35)

myininaya (myininaya):

can you perform this operation?

OpenStudy (anonymous):

oooo I see where I messed up now

OpenStudy (anonymous):

-840?

myininaya (myininaya):

no

myininaya (myininaya):

do you understand what I did up to 24+(-35) ?

OpenStudy (anonymous):

Yes I do

OpenStudy (anonymous):

-11, I add 24 to negative 35?

myininaya (myininaya):

ok so this addition and one of the numbers have a negative sign and the other has a positive sign in front of it we have 24 and 35 35>24 so since we have a negative in front of the 35 our answer will be negative (since the larger number has a negative sign in front of it) Now since we have oppsite signs, you must take the smaller one away from the bigger one 35 - 24 ---- 11 now we said our answer is negative since we have 24+(-35) so the answer is -11

myininaya (myininaya):

oh lol you got it

OpenStudy (anonymous):

Haha ok thanks :P

myininaya (myininaya):

Please let me know if you have anymore questions about this problem?

OpenStudy (anonymous):

I will let you know if I do

myininaya (myininaya):

Okay peace

OpenStudy (anonymous):

43 + 12 ÷ 4 - (2-5) . OK I got me another one

myininaya (myininaya):

you have grouping symbols so perform was is inside there first 43+12/4 -(-3) now we have division we need to perform that next 43+3-(-3) now perform the addition/subtraction as it occurs left to right

OpenStudy (anonymous):

49, doesnt two negatives make a positive

OpenStudy (anonymous):

the answer is 70, I think i got this now

myininaya (myininaya):

46-(-3) 46+3 49 very good 49 is the answer

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