RULES
A positive times a negative number makes a...
Negative
-7 + 12
5
2-3
-1
4 x (-2)
-8
6 / (-2)
-3
When adding numbers with opposite signs you have to...
Example: (+) + (-)
Subtract
-12+4
-8
-10-(-5)
-5
-1 x 4 x -8
-32
-36 / (-6)
6
A negative divided by a negative makes a...
Positive
-7+(-7)
-14
3-(-9)
12
5 x (-4) x (-2) x (-1)
-40
-81 / 3
-27
When adding a positive and a negative the sign of the answer is...
(The positive number is bigger)
positive
10+(-10)+(-10)
-10
-1-(-12)
11
-12 x (-9) x 1 x (-1) x (-1)
108
144 / -12
-12
To convert a subtraction expression to addition you have to...
1. Keep the sign of the first number
2. Swap the operator
3. Change the sign of the second number
-6+4+(-3)+9
4
10-(-10)-5
15
-12 x (-1) x (-2) x 6 x (-1) x (-1)
-144
-132 / -11
12