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Adding and Subtracting

Adding and Subtracting

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Adding and Subtracting

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  1. Adding and Subtracting Integers

  2. When adding integers, remember the following pneumonic devices: U S B L A S S dd ign ame ubtract ike signs nlike signs igger number

  3. 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

  4. Let’s PracticeClick on the correct answer. 1. -5 + 3 = a. 2 b. -2 c. 8 d. -8

  5. Sorry! Try again

  6. You’ve done it! Let’s ride right on to the next one.

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

  8. Sorry, Dude—Maybe you need new glasses! Try Again

  9. HI—YA! Way to Go! On to the next one!

  10. 3. -8 + (-3) = a. 5 b. -5 c. 11 d. -11

  11. Aw! Come on! Don’t look so sad! You can try again!

  12. You’ve unlocked the right door! Now on to subtracting integers

  13. Subtracting Integers When you subtract integers, it’s easy to remember the following: COPY, CHANGE, CHANGE

  14. COPY, CHANGE, CHANGE 4 – 9 Copy the first number Change the minus sign to addition Change the second number to its opposite (sign) 4 + (-9) - = 5 Now you are adding unlike signs (USB), so subtract 9- 4 And Keep the sign of the bigger number

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

  16. Let’s not run out of steam here! You can give it another shot!

  17. You’re blasting off! Way to go!! Blast your way to the next one!

  18. 5. -5 - 15 a. 10 b. -10 c. 20 d. -20

  19. It looks like you’ve got more work to do! Sorry, try again!

  20. Way to Go!! You’re #1 Now on to #6

  21. 6. 10 – (-4) a. 6 b. -6 c. 14 d. -14

  22. OOPS! An empty locker! Try again!

  23. You’ve fought long and hard, but you WON the battle!! Click here to set it up for the next person