Mathematics
11 Online
OpenStudy (anonymous):
-10+(-11)
write in lowest terms???
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OpenStudy (saifoo.khan):
-10 - 11
Same signs, add terms.. with the sign of the bigger one.. so:
-21
OpenStudy (anonymous):
what about -17+4?
OpenStudy (anonymous):
how do i know if im suppose to add or subract? its confusing!
OpenStudy (saifoo.khan):
different signs, subtract them.. with the sign of bigger one:
-13
OpenStudy (saifoo.khan):
the signs tell you.
If you have same signs: Add them.
Different signs: subtract them.
In both cases, put the sign of the bigger term.
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OpenStudy (anonymous):
5-(-3)?
is this gonna be 8?
OpenStudy (anonymous):
im so confused :(
OpenStudy (saifoo.khan):
great, right.
OpenStudy (anonymous):
im right???!!!
OpenStudy (saifoo.khan):
You get a medal for that answer!! :D
yes, u r correct.
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OpenStudy (anonymous):
yay!!! :D
okay this one -32 - (-12) = 44????
OpenStudy (saifoo.khan):
Damn it, no! :/
OpenStudy (saifoo.khan):
solve step by step.
OpenStudy (anonymous):
aw :(
but you said if there the same signs to add them?
OpenStudy (anonymous):
20?
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OpenStudy (anonymous):
YUP
OpenStudy (saifoo.khan):
Right. but look:
-32 + 12
different signs, subtract them.
20. BUT WITH THE SIGN OF THE BIGGER NUMBER.
so, -20
OpenStudy (saifoo.khan):
kahn, sorry u r wrong.
OpenStudy (anonymous):
so if its (-12) im suppose to make it the opposite so it will turn to a positive?
OpenStudy (saifoo.khan):
No,
- * - = +
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OpenStudy (anonymous):
-32-(-12)
32+(-12)
32-12=20 or i guess wt u r saying it would be like ,
-32-(-12)
-32+12=-20 (sign of bigger value which is 32)
OpenStudy (saifoo.khan):
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