Mathematics
22 Online
OpenStudy (charlest):
Simplify.
16 – 7 – (–4) + 12
A.
–7
B.
17
C.
25
D.
39
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OpenStudy (janu16):
C 25
OpenStudy (charlest):
When I do the equation though I get 17.
OpenStudy (janu16):
simplify brackets
16−7+4+12
16−7+4+12
2 Simplify
25
OpenStudy (janu16):
16 -7 is 9 than 9 - -4 is 13 than 13 +12 is 25
OpenStudy (janu16):
you did something wrong
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OpenStudy (charlest):
16-7=9 9-4=5 5+12=17
I keep getting 17
OpenStudy (janu16):
its 9- negative 4
OpenStudy (janu16):
do you see it?
OpenStudy (janu16):
you did 9 - 4 but its supposed to be 9 - negative 4
OpenStudy (charlest):
I'm subtracting the absolute values because they're not the same sign
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OpenStudy (janu16):
if you pick 17, its gonna be wrong
OpenStudy (janu16):
ok look let me explain
OpenStudy (janu16):
what is 16 -7?
OpenStudy (charlest):
9
OpenStudy (charlest):
9-(-4)= 5
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OpenStudy (janu16):
no its 13
OpenStudy (charlest):
Im supposed to subtract the absolute values if the signs are different
OpenStudy (janu16):
can you put that in calcultaor
OpenStudy (janu16):
they are not different
OpenStudy (janu16):
look if you put 9-(-4) in calc you will get 13 than +12 is 25
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OpenStudy (charlest):
no 9 is positive and 4 is negative that's what im not getting
OpenStudy (janu16):
you are doing 9 MINUS(negative 4)
OpenStudy (janu16):
even though 9 is positvie, its telling you to subtract
OpenStudy (charlest):
wait, why are you adding?
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OpenStudy (janu16):
im not check thsi link plz
OpenStudy (janu16):
check this and tell me if you understand
OpenStudy (charlest):
oh. It's turning the subtraction sign into a addition sign. ok i get it now
OpenStudy (charlest):
so it's C?
OpenStudy (janu16):
no i see what you did i think
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OpenStudy (janu16):
nvm
OpenStudy (janu16):
you understand right?
OpenStudy (charlest):
In my lesson, My teacher told me to subtract the absolute values if the signs are different
OpenStudy (janu16):
ok i dont know what that means cause i didnt learn tht but do you understand what im showing?
OpenStudy (charlest):
im subtracting the absolute values instead of adding them.
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OpenStudy (janu16):
ohok
OpenStudy (janu16):
so its C 25
OpenStudy (charlest):
yeah
OpenStudy (charlest):
ok I'll see what i get
OpenStudy (janu16):
yup
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OpenStudy (janu16):
let me know cause im 100 percent sure its correct and you even saw the link
OpenStudy (charlest):
40% (TT_TT)
OpenStudy (charlest):
I think i was right
OpenStudy (janu16):
ok what did you pcik
OpenStudy (jjcoolja12):
16−7−(−4)+12
=25
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OpenStudy (charlest):
no you were right