Did you get all the problems right on the last screen? If so, did your expression match the given expression? If not, it's okay. . . . often times there is more than one way to work a problem. As long as you are confident that your answer makes sense, your expression can be different than someone else's. Take a look at the chart again, but this time, try to come up with a different expression that will answer the same problem.
| Word Problem | Integer Expression |
| I owe my friend $3 and my mom owes me $5. How much money will I have after all is settled? | 5 - 3 = 2 Notice here, you are no longer adding, but subtracting. Subtracting integers is like adding the additive inverse, so subtracting 3 is like adding -3. |
| Mt. Hwajangsan in South Korea is 935 feet above sea level. Death Valley in the U.S. is 279 ft below sea level. What's the difference in elevation? | 935 + 279 = 1214 Since you know that the two numbers are on either side of the zero reference, you can add their absolute values and get the same result. |
| The temperature was 7° below zero and it dropped another 5 degrees during the night. What is the new temperature? | (-7) + (-5) = -12 This expression gives the same result as before because you are adding a negative instead of subtracting a positive. |
| Rome was established in 33 B.C.E. and fell in 476 C.E. How long did the Roman Empire last? | 476 + 33 = 509 Like the elevation example, the two numbers on the timeline are on opposite sides of zero, thus adding the absolute value will give you the distance between the two numbers. |
