Adding and Subtracting Integers When adding integers remember
Adding and Subtracting Integers
When adding integers, remember the following pneumonic devices: LASS USB
Adding Like Terms (LASS) -6 + (-8) Like signs, so simply Add = -14, and then keep the same sign Adding Unlike Terms (USB) 6 + (-8) Unlike signs, so Subtract 8 -6 2 = -2 Then keep the sign of the Bigger number
Let’s Practice Click on the correct answer. 1. -5 + 3 = a. 2 b. -2 c. 8 d. -8
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You’ve done it! Let’s ride right on to the next one.
2. 4 + (-3) a. 1 b. -1 c. 7 d. -7
Sorry, Dude— Maybe you need new glasses! Try Again
HI—YA! Way to Go! On to the next one!
3. -8 + (-3) = a. 5 b. -5 c. 11 d. -11
Aw! Come on! Don’t look so sad! You can try again!
You’ve unlocked the right door! Now on to subtracting integers
Subtracting Integers When you subtract integers, it’s easy to remember the following: COPY, CHANGE
COPY, CHANGE 4– 9 Copy the first number Change the minus sign to addition 4 +(-9) = -5 Change the second number to its opposite (sign) Now you are adding unlike signs (USB), so subtract 9 - 4 And Keep the sign of the bigger number
More Practice 4. 2 – 10 = a. 8 b. -8 c. 12 d. -12
Let’s not run out of steam here! You can give it another shot!
You’re blasting off! Way to go!! Blast your way to the next one!
5. -5 - 15 a. 10 b. -10 c. 20 d. -20
It looks like you’ve got more work to do! Sorry, try again!
Way to Go!! You’re #1 Now on to #6
6. 10 – (-4) a. 6 b. -6 c. 14 d. -14
OOPS! An empty locker! Try again!
You’ve fought long and hard, but you WON the battle!! Click here to set it up for the next person
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