Addition and Subtraction with Rational Numbers

Which of the following diagrams correctly represents 4+(−3)+(−2)?

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Match the followingDetermine whether each sum results in a positive or negative value.

• -68

• 56+(−72)

• -64.45

• −45+(−23)

• -16

• −38+81

• 43

• 3 3/4+(−6 1/2)

• -2 3/4

• −24.78+(−39.67)

Which of the questions below can be answered using the sum -12+10? Select all that apply.

• At 6:00 a.m., the temperature was -12 degrees Fahrenheit. Two hours later, the temperature was 10 degrees warmer. What was the temperature at 8:00 a.m.?

• While playing the Integer Game, Richard's hand had a value of -12, and Jason's hand had a value of 10. How many more points did Jason have than Richard?

• Harper owed her mother $10. In order to go to the movies, she had to borrow $12 from her mother. How much does Harper owe her mother now?

• A quarterback lost 12 yards on first down but then gained 10 yards on second down. What is the quarterback's total number of yards?

What card(s) could you remove from your hand in order to increase your score?  Select all that apply.

• 4

• -8

• -3

• 2

Add. 

• -3

• 0.8

• -4

• 4

-51 + 81.623

• 30.623

• -30.623

• 132.623

• -132.623

- 5.62 + (- 12.9)

• -6.91

• - 18.52

• 6.28

• 6.91

5.23 - (-9.1)

• -3.87

• 3.87

• 4.32

• 14.33

Mr. Smith has an account balance of -$275.78.  He deposits $539.20 into his account.  What is Mr. Smith's account balance now?

• $813.98

• $263.42

• $539.78

• $345.98

-51 + 81.623

• 30.623

• -30.623

• 132.623

• -132.623