Integer Addition
-7 + (-2)?
-9
When adding two integers with the SAME sign, the sign of the answer is?
Whatever the sign of numbers is
A guppy was swimming 8 feet below the surface of the river. It swam down 6 more feet to escape a large, hungry fish. What is the position of the guppy now relative to the surface?
-14
(-7) - 2?
-9
Compare. Which integer is larger?
-14 OR 13
13
-2 + (-4)?
-6
When adding two negative numbers what do you always get?
Negative
Zeke is playing a card game called At Face Value. At the end of each round, players earn positive points for their remaining number cards but negative points for their face cards. At the end of round 1, Zeke earns –5 points. At the end of round 2, he earns –6 points. What is Zeke's score now?
-11
2 - (-5)?
7
Compare. Which integer is smaller?
-32 OR -5
-32
-10 + 7?
-3
When adding two integers with DIFFERENT signs, the sign of the answer is?
The sign of the bigger number.
Callie began a science experiment with 18 grams of an unknown solid. During the experiment, the change in the mass of the solid was -7 grams. What was the mass of the solid at the end of the experiment?
11 grams
1 - 7?
-6
Compare. Which integer is larger?
-28 OR -25
-25
-28 + 5?
-23
When adding two integers with DIFFERENT signs (and the negative number is 'bigger'), what will you always get?
Negative
When Liz woke up in the morning, it was 6°F. By the late afternoon, the temperature had dropped 9°F. What is the temperature now?
-3°F
(-9) - 4?
-13
Compare. Which integer is smaller?
-48 OR -38
-48
100 + (-28)?
72
How can you change a subtraction problem into an addition problem?
Add the opposite
The temperature when Olivia arrived at school was a very chilly –4°F. By the time school got out, the temperature had risen 13°F. What was the temperature when school got out?
9°F
(-100) - (-67)?
-33
Compare. Which integer is larger?
-1,400,000 OR -1,400,001
-1,400,000