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Look at the students below… what are they doing differently?

Look at the students below… what are they doing differently?. Order of Operations. Definition. The order in which mathematicians perform math problems. Parenthesis – working from the inside…out Exponents Multiply or Divide – Left to Right Add or Subtract – Left to Right. Mnemonic Device.

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Look at the students below… what are they doing differently?

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  1. Look at the students below…what are they doing differently?

  2. Order of Operations

  3. Definition • The order in which mathematicians perform math problems. • Parenthesis – working from the inside…out • Exponents • Multiply or Divide – Left to Right • Add or Subtract – Left to Right

  4. Mnemonic Device • Please • Parenthesis • Excuse • Exponents • My Dear • Multiply or Divide – Left to Right • Aunt Sally • Add or Subtract – Left to Right

  5. Parenthesis Multiplication Exponents Addition Subtraction Example 1: 2 x 3 - (4-2) + 32

  6. 2 x 3 - (4-2) + 32 Parenthesis 2 x 3 - 2 + 32 Exponents 2 x 3 - 2 + 9 Multiply 6 - 2 + 9 Add or Subtract – Left to Right 4 + 9 13

  7. Parenthesis Multiplication Exponents Addition Subtraction Example 2: 4 X 6 – (3 + 4) + 22

  8. 4 X 6 – (3 + 4) + 22 Parenthesis 4 x 6 - 7 + 22 Exponents 4 X 6 – 7 + 4 Multiply 24 – 7 + 4 Add or Subtract – Left to Right 17 + 4 21

  9. Practice Problems • 3 + 5 x 7 Answer • (1 + 3) x (8 - 4) Answer • 6 - 6 + (7 - 0) - 7 Answer • 4 - 3 + (5 - 1) - 3 Answer • 3 + 9 x 8 – 62 Answer • 24 / 6 x 2 x 2 / 4 Answer • 2+3 x (4+(6 x 3-8)) x2 Answer

  10. Resources • Math Goodies • http://www.mathgoodies.com/lessons/vol7/order_operations.html • Amby.com • http://amby.com/educate/ord-op/ • The World of Math Online • http://www.math.com/school/subject2/lessons/S2U1L2GL.html • Fun Brain • http://www.funbrain.com/algebra/index.html • Dositey – Mystery Game • http://www.dositey.com/math/m/mystery2SMA.htm • Aplus Math – Flash Cards • http://www.aplusmath.com/cgi-bin/Flashcards/Order_Of_Operations • AAA Math.com • http://www.aaamath.com/pro73c-order-of-operations.html

  11. 3 + 5 x 7 3 + 35 38 Back

  12. (1 + 3) x (8 - 4) 4 x (8 – 4) 4 x 4 16 Back

  13. 6 - 6 + (7 - 0) – 7 6 – 6 + 7 - 7 0 + 7 – 7 7 – 7 0 Back

  14. 4 - 3 + (5 - 1) – 3 4 – 3 + 4 -3 1 + 4 – 3 5 – 3 2 Back

  15. 3 + 9 x 8 – 62 3 + 9 X 8 – 36 3 + 72 – 36 75 – 36 39 Back

  16. 24 / 6 x 2 x 2 / 4 4 x 2 x 2 8 x 2 16 Back

  17. 2+3 x (4+(6 x 3-8)) x2 2 + 3 x (4 + (18 – 8)) x 2 2 + 3 x (4 + 10) x 2 2 + 3 x 14 x 2 2 + 42 x 2 2 + 84 86 Back

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