Elevation
The hiker went 40 feet above sea level. Draw a visual model to represent this expression.
+40ft on number line
The temperature in the Arctic was 35˚ below zero. Draw a visual model to represent this expression.
-35 degrees below zero
a. Joey’s arcade game card was debited 83 points.
b. How would the rational number change if 83 points were credited to Joey’s arcade game card instead of debited?
a. -83 points
b. +83 points
a. In Switzerland, the winter night was 4°F below zero. In Colorado, the winter night was 2°F below zero. Write a comparison statement.
b. Which place was warmer that night?
a. -4<-2
b. Colorado
The submarine dove 350 feet below sea level. What was the change in elevation from zero?
|-350|=350 units
The ship sank 150 feet below sea level. Write the rational number.
-150 ft
The temperature in the city at night was 55˚ above zero. Draw a visual model to represent this expression.
+55 degrees above zero.
Sheila was debited 30 minutes of computer time because she didn’t do her chores today. If she is allowed a half-hour of computer time every day, write the rational number that expresses this. Explain how the new amount of computer time relates to zero for today.
-30 minutes;
Sheila was left with zero minutes of computer time
a. Tim invested $1550 in the stock market. Susan invested $1555 in the stock market. Write a comparison statement.
b.Who invested less money in the stock market?
a. $1550<$1555
b. Tim
The hiker climbed 125 feet above sea level.
What was the change in elevation from zero?
|125|=125 units
The submarine dove 115 feet below sea level. What is the opposite elevation?
+115 ft
The temperature in the Arctic was 21˚ below zero. What is the opposite temperature?
+21 degrees
Table 3 was credited ten extra table points because all of the students turned in their homework. How would the rational number change if 10 table points were taken away from Table 3 instead of credited?
+10 points
-10 points
a. Joy and Michelle both had $250.34 in their checking accounts. Joy’s account was credited $151.45 and Michelle’s account was credited $102.50. Write a comparison statement.
b. Who has more money in her account now?
a. 151.45>102.50
b. Joy
Place the absolute values in order from greatest to least. |7 1/2| |–2 1/3| |–10 1/10| |4 1/5|
|-2 1/3|, |4 1/5|, |7 1/2|, |-10 1/10|
The shallow area of the Bermuda Triangle is 200 feet deep. Draw a visual model to represent this expression.
-200 ft below zero
The morning temperature was 30˚ above zero. By night, the temperature was 10˚ below zero. Which temperature is warmer?
30 degrees above zero
Jamie’s video game character rescued the princess and was credited 1,000 points. If Jamie had 12,750 points just before the princess was rescued, how many points do they have now?
13, 750 points
Leslie solved the following problem. Explain her error and find the correct answer. The temperature yesterday was 20°F below zero. Today, the temperature is 5°F below zero. Which temperature is warmer? Leslie’s answer was: -20°F > -5°F; -20°F is warmer than -5°F.
-20 < -5
-5 is closer to zero therefore it is warmer than -20
How are |1/6 | and |–1/6 | the same?
They both have an absolute value of 1/6
Represent the following situation with an expression. Mike went on a hike. He started at 5 feet below sea level and climbed 10 feet.
-5+10
Cathy solved the following problem. Explain her mistake and find the correct answer.
The temperature was 78˚ above zero.
Cathy’s answer: -78˚
+78 degrees
The word above indicates that the answer will be positive.
Represent the following situation with an expression. Gene had a $25 store credit and then bought a $30 sweater. Explain your answer.
25-30
On Monday, Eric’s checking account balance was $299.56. His account was debited $35.47 for a shirt he bought. On Wednesday, he made a deposit for $150, which was credited to his account. Was Eric’s balance on Thursday higher or lower than it was on Monday?
Higher
Brian’s checking account balance is -$50. He just wrote a check for $200. How much money does Brian need to put into his checking account so the check will clear?
$250