Operations with Rational Numbers Review

• 8.23

• 8.61

Answer explanation

Change the fraction 2/5 into a decimal and then add.

What is the value of the expression?

7.0352 + (-5.37)

Answer explanation

When it's different signs and it's addition, you subtract the highest by the lowest number. The highest number's sign stays in the final answer.

Answer explanation

-Add a line, change the sign

-Change any mixed fractions to improper fractions

-Get the same denominators by doing least common multiple

-Use the addition rules

Answer explanation

Use long division since you can't use a calculator. Remember that for the divisor, move the decimal all the way to the right to make it a whole number. The dividend (the number inside the long division bar) needs to have its' decimal moved to the right the SAME amount of times you did for the divisior.

• -0.71

• 0.56

• -1.96

• 2

• 9.25

• $9.28

• $14.53

• $20.17

• $21.98

Answer explanation

Since the temperature is decreasing, your answer should be negative (-). To figure out the total difference, you subtract -5.2 by 18 3/9 using a calculator.

Florida wildlife researchers used trail cameras in two different nature parks in South Florida to estimate the population of white-tailed deer in the Florida National Wildlife Refuge and the Bear Island unit of the Big Cypress National Preserve. The table shows the average number of deer per square mile in each area and the total area of the park.

What is the ESTIMATED total population of deer in the two nature parks? **Calculator Question** Round to the nearest whole number.

Answer explanation

Multiply the number of white deer per square mile by the total for each park. Add the results together. Round it to the nearest whole number since you can't have part of a deer.

• 5.1 minutes

• 15.8 minutes

• 28.2 minutes

• 40 minutes

Answer explanation

Using a calculator subtract 988 7/12 - 700 to see how far apart the distances are. Take that answer and divide it by 56 1/5 and you should get your answer.