Solving Problems Involving Rational Numbers — Unit test Answers

Vicky records the low temperature for three consecutive days. Between the first and second days the temperature increased 6 degrees. Between the second and third days the temperature decreased 3 degrees. On the third day the low temperature was –6º. What was the low temperature on the first day?

Which expression is modeled by this arrangement of tiles?

Katrina's mother is 2 inches shorter than her father, Katrina is 2 inches shorter than her mother, and Katrina's brother is 2 inches shorter than Katrina. Which best represents the change in height from Katrina's father to her brother?

Kale is hiking 2,345 feet above sea level. The peak of the mountain he is climbing is 3,283 feet above sea level. What is the vertical distance between Kale and the mountain peak?

Which point on the number line represents the product ?

What is the difference of the fractions? Use the number line to help find the answer.

Johnny rode his bike of a mile from his house to the lake on a straight path. Then, he turned around and rode his bike miles in the opposite direction. About how far is Johnny from his house?

What is the solution to ?

Which point on the number line most closley represents ?

Noa was walking in the forest and measured the circumference of two trees that he found. The first tree measured inches around, and the second tree measured inches around. Noa wanted to find the difference of the circumferences of the two trees. He recorded his steps in the table.StepsNoa’s workStep 1Step 2Step 3Step 4 In which step did Noa first make an error?

Which tiles should be added to the model below to make zero?

What is the product of and ?

Kari estimated the quotient of to be –8. Which best describes her error?

Water flowed out of a tank at a steady rate. A total of gallons flowed out of the tank in hours. Which expression determines the quantity of water leaving the tank per hour?

How is the product of 2 and –5 shown using integer tiles?