Rules
Addition
Subtraction
Multiplication
Division
100
When you add two positives you (sometimes/always/never) get a positive sum.
What is always
100
(-4) + (+8) =
(+4)
100
(-1) - (-1)
What is 0
100
(-1) x (-25) =
What is (+25)
100
(-21) / (-7) =
What is (3)
200
When you add two negatives you (sometimes/always/never) get a positive sum.
What is never
200
(-12) + (-12) =
What is (-24)
200
(-20) - (+10)
What is (-30)
200
(-2.5) x (2) =
What is (-5.0)
200
(-144) / (-12) =
What is (12)
300
When you multiply two integers with the same sign you (sometimes/always/never) get a negative product.
What is never
300
(-50) + (-7.5) =
What is (-57.5)
300
(-45) - (-15) =
What is (-30)
300
(0.7) x (-9) =
What is (-6.3)
300
(-1.2) / (2) =
What is (-0.6)
400
When you divide by two integers with different signs you (sometimes/always/never) get a negative product.
What is always
400
(-100) + (2.5) =
What is (-97.5)
400
(-224) - (-25) =
What is (- 199)
400
(0.09) x (-0.8) =
What is (-0.072)
400
(-56) / (0.8) =
What is (-70)
500
You call both positive and negative whole numbers this.
What are integers
500
(-501) + (+500)
What is (-1)
500
(-5012) - (-28)
What is (-4984)
500
(-125) x (15) =
What is (-1875)
500
(-6.25) / (0.5) =
What is (-12.5)
M
e
n
u