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Adding and Subtracting Integers

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When adding integers, remember the following pneumonic devices: L A S S U S B

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Adding Like Terms (LASS) -6 + (-8) Like signs, so simply Add -6 + (-8) Like signs, so simply Add = 14, and then keep the same sign = 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

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Lets Practice Click on the correct answer. 1. -5 + 3 = a. 2 b. -2 c. 8 d. -8

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Sorry! Try again Try againTry again

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Youve done it! Lets ride right on to the next one. Youve done it! Lets ride right on to the next one. next one next one

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2. 4 + (-3) a. 1 a. 1 b. -1 c. 7 d. -7

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Sorry, DudeMaybe you need new glasses! Try Again

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HIYA! Way to Go! On to the next one! next one

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3. -8 + (-3) = a. 5 a. 5 b. -5 c. 11 d. -11

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Aw! Come on! Dont look so sad! You can try again! try again!

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Youve unlocked the right door! Now on to subtracting integers

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Subtracting Integers When you subtract integers, its easy to remember the following: COPY, CHANGE, CHANGE

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4 – 9 Copy the first number 4+(-9) Change the minus sign to addition 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 = 5 -

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More Practice 4. 2 – 10 = a. 8 b. -8 c. 12 d. -12

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Lets not run out of steam here! You can give it another shot! another shot

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Youre blasting off! Way to go!! Blast your way to the next one!next one

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5. -5 - 15 a. 10 a. 10 b. -10 c. 20 d. -20

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It looks like youve got more work to do! Sorry, try again!try again

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Way to Go!! Youre #1 Now on to #6on to #6

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6. 10 – (-4) a. 6 a. 6 b. -6 c. 14 d. -14

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OOPS! An empty locker! Try againTry again!

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Youve fought long and hard, but you WON the battle!! Click here to set it up for the next person

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5.9 + = 10 a)3.6 b)4.1 c)5.3 Question 1: Good Answer!! Well Done!! 5.9 + 4.1 = 10 Question 1:

5.9 + = 10 a)3.6 b)4.1 c)5.3 Question 1: Good Answer!! Well Done!! 5.9 + 4.1 = 10 Question 1:

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