Same Sign
Malachi hikes for 2.5 miles & stops for lunch The he hikes for 1.5 more miles. How many miles does he hike all together?
4 miles
-8 + 5
-3
What is another word for additive inverse?
Opposite
-2.75 + (-3.5) + 5 =
-1
-3/4 + (-1/2)
-1 & 1/4
-2.5 + 6
3.5
Anything plus its additive inverse = ___?
0
-1.5 + 3.5 + 2=
4
3 + 1 & 1/2
4 & 1/2
Do you think -5 + 7 and 7 + (-5) have the same sum? Does it matter if the negative number is the first addend or the second addend?
The order of the addends does not matter when adding a positive or negative rational number. -5 + 7 and 5 + -7 both = 2
A football team loses 3.5 yards on their first play. Then gains 3.5 yards on their next play. What is the overall increase or decrease in yards?
-3.5 + 3.5 = 0 yards
30 + 15 + (-25) =
45+ (-25) = 20
Explain how to determine whether to move right or left on the number line when adding rational numbers.
Move to the right if the number you are adding is positive and to the left if the number you are adding is negative.
During the day, the temperature increases by 4.5 degrees. At night it decreases by 7.5 degrees. Find the overall change in temperature.
4.5 + (-7.5) = -3
Kendrick adds 3/4 cup of chicken stock to a pot. he then drains 3/4 cup of that chicken stock from the pot. What is the overall in crease or decrease in the amount of chicken stock in the pot.
3/4 - 3/4 = 0 cups of chicken stock
Tina spent $5.25 on craft supplies to make friendship bracelets. She made 3.75 on Monday. On Tuesday she sold an additional $4.50 worth of bracelets. What was Tina's overall profit or loss?
-5.25 + 3.75 + 4.50 -5.25 + 8.25 =3