Represent Integer Operations

The circles in the model represent positive and negative units.

Which equation is true based on the model?

Lilly is playing a card game. She chooses four cards. The value of her four cards are -10, 4, -8, and 2.

What is the sum of the values of Lilly's four cards?

Which expression is represented on the number line?

Sam spent $5 on a large soda and bought 3 hotdogs for $2 each. She used her debit card to pay for the soda and hotdogs. The expression below is used to represent the change in the balance of Sam's checking account. (-5) + 3(-2) Write the integer that represents the change in the balance of Sam's checking account from these purchases.

(a)  

Match the following

Match the following with the correct operation and sign of the answer.

Jason stopped at the grocery store on his way home from work. He used his debit card to purchase 2 salads for $7 each, 3 bottles of soda for $2 each, and a sandwich for $8. The change in the balance of Jason's checking account is represented by the expression below. What integer represents the change in the balance of Jason's checking account? Enter your answer in the box.

Tony had -15 dollars in his bank account. He deposited 45 dollars into his account. How much money, in dollars, does he now have in his bank account?

(a)  

-5 - (- 3)

12 - (-12)