How to subtract negative numbers - SAT Math
Card 0 of 6
If x is a negative integer, what else must be a negative integer?
If x is a negative integer, what else must be a negative integer?
By choosing a random negative number, for example: –4, we can input the number into each choice and see if we come out with another negative number. When we put –4 in for x, we would have –4 – (–(–4)) or –4 – 4, which is –8. Plugging in the other options gives a positive answer. You can try other negative numbers, if needed, to confirm this still works.
By choosing a random negative number, for example: –4, we can input the number into each choice and see if we come out with another negative number. When we put –4 in for x, we would have –4 – (–(–4)) or –4 – 4, which is –8. Plugging in the other options gives a positive answer. You can try other negative numbers, if needed, to confirm this still works.
Compare your answer with the correct one above
–7 – 7= x
–7 – (–7) = y
what are x and y, respectively
–7 – 7= x
–7 – (–7) = y
what are x and y, respectively
x: –7 – 7= –7 + –7 = –14
y: –7 – (–7) = –7 + 7 = 0
when subtracting a negative number, turn it into an addition problem
x: –7 – 7= –7 + –7 = –14
y: –7 – (–7) = –7 + 7 = 0
when subtracting a negative number, turn it into an addition problem
Compare your answer with the correct one above
Evaluate: 
Evaluate:
Reconvert 
into single signs. Remember that double negatives will turn into a positive.
Reconvert
Compare your answer with the correct one above
Subtract: 
Subtract:
Subtracting a negative number moves the number farther left of the zero digit on the number line.
The answer is: 
Subtracting a negative number moves the number farther left of the zero digit on the number line.
The answer is:
Compare your answer with the correct one above
Subtract: 
Subtract:
Simplify the expression by eliminating the double negative signs. Two negatives multiplied by one another will result in a positive number.
Convert the signs.
Add the right side of the equation.
The answer is 
.
Simplify the expression by eliminating the double negative signs. Two negatives multiplied by one another will result in a positive number.
Convert the signs.
Add the right side of the equation.
The answer is
Compare your answer with the correct one above
Simplify the following expression:
Simplify the following expression:
Simplify the following expression:
To subtract negative numbers, we must recall that subtracting negative numbers is the same as adding a positive. The two negatives cancel each other out to become positive.
So our answer is negative 220
Simplify the following expression:
To subtract negative numbers, we must recall that subtracting negative numbers is the same as adding a positive. The two negatives cancel each other out to become positive.
So our answer is negative 220
Compare your answer with the correct one above