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Rational Number Arithmetic

Last updated over 4 years ago

13 questions

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Question 1

1.

Select all the true statements.

2.3  + (-2.3) is equal to zero

(-3.7) + (-4.1) is positive

-2.6 - (- 12/4) is positive

5/2 + (-2.5) is negative

72 - (-100) is negative

Question 2

2.

A heron is perched in a tree 50 feet above sea level. Directly below the heron, a pelican is flying 17 feet above sea level. Directly below the birds is a trout, swimming 23 feet below sea level. Select all the true statements.

The difference in height between the pelican and the heron is -33 feet.

The difference in height between the pelican and the heron is 33 feet.

The distance between the heights of the pelican and heron is -33 feet.

The difference in height between the pelican and the trout is -40 feet.

The difference in height between the pelican and the trout is 40 feet.

The distance between the heights of the pelican and the trout is 40 feet

Question 3

3.

Let x=

Question 4

4.

Let x= -11/8 and y= -11/4 WHich expression has a negative value?

x + y

x - y

Question 5

5.

The table shows transactions from five different bank accounts. Fill in the missing number for account 2.

Question 6

6.

The table shows transactions from five different bank accounts. Fill in the missing number for account 3.

Question 7

7.

The table shows transactions from five different bank accounts. Fill in the missing number for account 4.

Question 8

8.

The table shows transactions from five different bank accounts. Explain what each of the numbers -10, -20, and -30 tells you about Account 5.

Question 9

9.

Jada walks up to a tank of water that can hold up to 10 gallons. When it is active, a drain empties water from the tank at a constant rate. When Jada first sees the tank, it contains 7 gallons of water. Three minutes later, the tank contains 5 gallons of water. At what rate is the amount of water in the tank changing? Use a signed number, and include the unit of measurement in your answer.

Question 10

10.

Jada walks up to a tank of water that can hold up to 10 gallons. When it is active, a drain empties water from the tank at a constant rate. When Jada first sees the tank, it contains 7 gallons of water. Three minutes later, the tank contains 5 gallons of water. How many more minutes will it take for the tank to drain completely? Explain or show your reasoning.

Question 11

11.

Jada walks up to a tank of water that can hold up to 10 gallons. When it is active, a drain empties water from the tank at a constant rate. When Jada first sees the tank, it contains 7 gallons of water. Three minutes later, the tank contains 5 gallons of water. How many minutes before Jada arrived was the water tank completely full? Explain or show your reasoning.

Question 12

12.

Evaluate:

Question 13

13.

Evaluate: