Positive or Negative
Select all the sums that are positive.
-5 + (-2) =
5 + (-2) =
-3 + 4 =
0 + (-3) =
-2 + 4 =
5 + (-2)
-3 + 4
-2 + 4
While playing a board game, unlucky Lawrence had to move back 2 spaces for 4 turns in a row. What expression represents his change in position?
1) 4 x 2
2) -4 x (-2)
3) 4 x (-2)
3
Sandra plays a matching game. In order to advance to the next level, she must score at least 10 points. She scores 18 points for correct matches and -6 points for incorrect matches.
Sandra scored how many points and did she score at least 10 points?
12 points / yes
Finish the sentence. Opposites combine to make .....
zero
When you are multiplying or dividing by two fractions that both have a negative sign. Will the answer be positive or negative?
positive
Looking at a number line, there is one arrow going to the left 4 spots and another arrow going to the left 9 spots ending on -13. What expression does this represent?
-13 + 4
-4 - 13
-4 - 9
-4 + 9
-4 - 9
There is a hot air balloon floating in the sky. It is descending 500 feet in 1 minute. What is the balloons change in elevation after 3 minutes?
-1500
The temperature in Juno, Alaska, was -3 in the afternoon. After the sun went down, the temperature dropped 6 degrees. What was the temperature after the sun went down?
-9
When adding two integers that have the same signs what rule do you use?
Add and keep the signs the same
When multiplying or dividing two decimals and one sign is positive and the other is negative, will the answer be positive or negative?
Which of these situations can be represented by the opposite of -25? Pick 2
1. A scuba diver is 25 feet below the surface
2. Leon gets paid $25
3. An airplane descends 25 feet
4. Sara climbed up 25 flights of stairs
2 & 4
A machine drill is used to access water under the ground at 160 feet below the surface. If the machine drills the same distance each day for 4 days, what is the change in the locations of the bottom of the hole each day.
-40
John recorded a temperature of 62 degrees this morning for science class. The temperature increased by 6 1/2 degrees in the afternoon before decreasing 8.7 degrees in the evening. What was the evening temperature?
59.8
When subtracting integers or rational numbers what two rules do we use.
Keep Change Change / Subtract and keep sign of the bigger number.
Which expressions have a product of -18
1) -2 x (-9)
2) -6 x 3
3) -3 x 6
4) -9 x 2
2, 3, & 4
An elevator picks up a group of people on the 3rd floor which is 36 feet above the ground floor. Then the elevator ascends to the 6th floor. After picking up another group of people on the 6th floor the elevator descends to the ground 72 feet in 12 seconds. What integer represents the elevators change in elevation in feet per second?
-6
Mr. Johnson digs a hole that is 1.7 feet below the ground level. He plants a bush that is 3 2/10 feet tall from the bottom of the root to the top branch. How much of the bush is above the ground?
1.5
What is absolute value mean?
The distance a number is away from zero
Which of these expression would give you a negative product?
1) -3 x (-15)
2) x(-x)
3) -5(-2) x (-1)
4) A negative number times two positive numbers
2,3, & 4
Monica spent $5.25 on cheese and fruit at the farmers market. She bought 1/8 pound of apples, 1/4 poind of pears, and 1.25 pounds of bananas. If fruit cost $0.65 per pound, how much did Monica spend on cheese?
$4.19
Ronnie's cell phone came with 128 GB of memory. He used 20 GB recording videos and another 72 GB on photoes from his trip to Italy. Two Parts
A. Which expression should be used.
-128 + 20 + 72
128 + (-20) + (-72)
128 + (-20) - (-72)
B. How much memory does Ronnie have left on his phone?
A. 128 + (-20) + (-72)
B. 36
When adding two integers that have different signs what is the rule?
Subtract and keep the sign of the bigger number.