Can't understand why expression is evaluating to 0
$begingroup$
-1 - 3 - (-9) + (-5)
This expression is evaluating to 0, I don't know how when I do it on the paper I get to the answer -10 and are the parentheses changing the order of operation here if so what is to do first (-9) + (-5).
algebra-precalculus
asked Dec 4 '18 at 7:15
compusport scccompusport scc
82
$endgroup$
add a comment |
$begingroup$
-1 - 3 - (-9) + (-5)
This expression is evaluating to 0, I don't know how when I do it on the paper I get to the answer -10 and are the parentheses changing the order of operation here if so what is to do first (-9) + (-5).
algebra-precalculus
asked Dec 4 '18 at 7:15
compusport scccompusport scc
82
$endgroup$
$begingroup$
$-1-3=-4$, $-4-(-9)=5$, $5+(-5)=0$.
$endgroup$
– Lord Shark the Unknown
Dec 4 '18 at 7:20
add a comment |
$begingroup$
-1 - 3 - (-9) + (-5)
This expression is evaluating to 0, I don't know how when I do it on the paper I get to the answer -10 and are the parentheses changing the order of operation here if so what is to do first (-9) + (-5).
algebra-precalculus
asked Dec 4 '18 at 7:15
compusport scccompusport scc
82
$endgroup$
-1 - 3 - (-9) + (-5)
This expression is evaluating to 0, I don't know how when I do it on the paper I get to the answer -10 and are the parentheses changing the order of operation here if so what is to do first (-9) + (-5).
algebra-precalculus
algebra-precalculus
asked Dec 4 '18 at 7:15
compusport scccompusport scc
82
asked Dec 4 '18 at 7:15
compusport scccompusport scc
82
asked Dec 4 '18 at 7:15
compusport scccompusport scc
82
asked Dec 4 '18 at 7:15
compusport scccompusport scc
82
asked Dec 4 '18 at 7:15
compusport scccompusport scc
82
82
$begingroup$
$-1-3=-4$, $-4-(-9)=5$, $5+(-5)=0$.
$endgroup$
– Lord Shark the Unknown
Dec 4 '18 at 7:20
add a comment |
$begingroup$
$-1-3=-4$, $-4-(-9)=5$, $5+(-5)=0$.
$endgroup$
– Lord Shark the Unknown
Dec 4 '18 at 7:20
$begingroup$
$-1-3=-4$, $-4-(-9)=5$, $5+(-5)=0$.
$endgroup$
– Lord Shark the Unknown
Dec 4 '18 at 7:20
$begingroup$
$-1-3=-4$, $-4-(-9)=5$, $5+(-5)=0$.
$endgroup$
– Lord Shark the Unknown
Dec 4 '18 at 7:20
add a comment |
2 Answers
2
active
oldest
votes
$begingroup$
The negative in front of $-9$ applies to $-9$ first.
begin{align}
-1-3-(-9)+(-5) &= (-1)+(-3)+9+(-5)\
&= 9-1-3-5\
&=0
end{align}
answered Dec 4 '18 at 7:20
Siong Thye GohSiong Thye Goh
100k1465117
$endgroup$
add a comment |
$begingroup$
Follow the BODMAS rule. When there is a series of Addition and Multiplication, you operate from left. $ -1 -3 -(-9)+(-5) = -4 - (-9)+(-5) = -4 +9 +(-5) = 5+(-5) = 0 $
answered Dec 4 '18 at 7:24
1.4142121.414212
507
$endgroup$
add a comment |
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2 Answers
2
active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
$begingroup$
The negative in front of $-9$ applies to $-9$ first.
begin{align}
-1-3-(-9)+(-5) &= (-1)+(-3)+9+(-5)\
&= 9-1-3-5\
&=0
end{align}
answered Dec 4 '18 at 7:20
Siong Thye GohSiong Thye Goh
100k1465117
$endgroup$
add a comment |
$begingroup$
The negative in front of $-9$ applies to $-9$ first.
begin{align}
-1-3-(-9)+(-5) &= (-1)+(-3)+9+(-5)\
&= 9-1-3-5\
&=0
end{align}
answered Dec 4 '18 at 7:20
Siong Thye GohSiong Thye Goh
100k1465117
$endgroup$
add a comment |
$begingroup$
The negative in front of $-9$ applies to $-9$ first.
begin{align}
-1-3-(-9)+(-5) &= (-1)+(-3)+9+(-5)\
&= 9-1-3-5\
&=0
end{align}
answered Dec 4 '18 at 7:20
Siong Thye GohSiong Thye Goh
100k1465117
$endgroup$
The negative in front of $-9$ applies to $-9$ first.
begin{align}
-1-3-(-9)+(-5) &= (-1)+(-3)+9+(-5)\
&= 9-1-3-5\
&=0
end{align}
answered Dec 4 '18 at 7:20
Siong Thye GohSiong Thye Goh
100k1465117
edited Dec 4 '18 at 7:31
answered Dec 4 '18 at 7:20
Siong Thye GohSiong Thye Goh
100k1465117
answered Dec 4 '18 at 7:20
Siong Thye GohSiong Thye Goh
100k1465117
answered Dec 4 '18 at 7:20
Siong Thye GohSiong Thye Goh
100k1465117
100k1465117
add a comment |
add a comment |
$begingroup$
Follow the BODMAS rule. When there is a series of Addition and Multiplication, you operate from left. $ -1 -3 -(-9)+(-5) = -4 - (-9)+(-5) = -4 +9 +(-5) = 5+(-5) = 0 $
answered Dec 4 '18 at 7:24
1.4142121.414212
507
$endgroup$
add a comment |
$begingroup$
Follow the BODMAS rule. When there is a series of Addition and Multiplication, you operate from left. $ -1 -3 -(-9)+(-5) = -4 - (-9)+(-5) = -4 +9 +(-5) = 5+(-5) = 0 $
answered Dec 4 '18 at 7:24
1.4142121.414212
507
$endgroup$
add a comment |
$begingroup$
Follow the BODMAS rule. When there is a series of Addition and Multiplication, you operate from left. $ -1 -3 -(-9)+(-5) = -4 - (-9)+(-5) = -4 +9 +(-5) = 5+(-5) = 0 $
answered Dec 4 '18 at 7:24
1.4142121.414212
507
$endgroup$
Follow the BODMAS rule. When there is a series of Addition and Multiplication, you operate from left. $ -1 -3 -(-9)+(-5) = -4 - (-9)+(-5) = -4 +9 +(-5) = 5+(-5) = 0 $
answered Dec 4 '18 at 7:24
1.4142121.414212
507
answered Dec 4 '18 at 7:24
1.4142121.414212
507
answered Dec 4 '18 at 7:24
1.4142121.414212
507
answered Dec 4 '18 at 7:24
1.4142121.414212
507
507
add a comment |
add a comment |
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$begingroup$
$-1-3=-4$, $-4-(-9)=5$, $5+(-5)=0$.
$endgroup$
– Lord Shark the Unknown
Dec 4 '18 at 7:20