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7 th Grade Math

7 th Grade Math. Week of 8/18/14. Monday: Bell Work. 1) 7.2 + 4.31 = 2) 3.8 – 1.25 = 3) round to tenths- 2.9547. 1. Estimate. This word actually means….. find an answer close to the exact answer. What does this word mean to you?. Explain how you would use this word in math. Examples….

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7 th Grade Math

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  1. 7th Grade Math Week of 8/18/14

  2. Monday: Bell Work • 1) 7.2 + 4.31 = • 2) 3.8 – 1.25 = • 3) round to tenths- 2.9547

  3. 1. Estimate This word actually means….. find an answer close to the exact answer. What does this word mean to you? Explain how you would use this word in math. Examples…

  4. Lesson • Absolute Value and Opposites: 7. NS.1a Describe situations in which opposite quantities combine to make 0.

  5. Lesson • Absolute Value: • How far a number is from zero.Example "6" is 6 away from zero, but "-6" is also 6 away from zero.So, the absolute value of 6 is 6, and the absolute value of -6 is also 6.The symbol "|" is placed either side to mean "Absolute Value", so we can write: |-6| = 6 http://www.mathsisfun.com/definitions/absolute-value.html

  6. Additive Inverses (opposites) What you add to a number to get zero. The negative of a number.Example: The additive inverse of -5 is 5, because -5 + 5 = 0.The additive inverse of +5 is -5 as well.

  7. Exit / Closure • Write in your NB (composition notebook) 3 things that you learned today. **** Share with a friend.

  8. Tuesday: Bell Work • |-28| = • -|32| = • - 29 _____ -30

  9. 2. Evaluate This word actually means….. to find the value of a numerical or algebraic expression What does this word mean to you? Explain how you would use this word in math. Examples…

  10. Lesson • Integers with operations: • SPI 0706.2.5 Solve contextual problems that involve operations with integers.

  11. -|-8| = -8 *If the negative is outside the absolute value bar, it will create a negative answer. It is the same as multiplying the answer by -1. *Can be written -1 • |-8| = -8

  12. Foldable Cut this section off

  13. Foldable Fold in 1/2

  14. Foldable Cut 3 lines to make 4 flaps

  15. Foldable Multipli-cation Division Addition subtraction

  16. Addition Notes • 2 integers with same sign - Add the absolute values • Keep the same sign -2+-3 = -5 4+3=7 2) 2 integers with different signs - find the difference of the absolute values- keep sign of the greater absolute value - 5 + 8= 3 4+ -2= 2 *same signs add and keep/ different signs subtract Key words: Deposit, ascend, rose, gain, increase, above

  17. Subtraction Notes • Change all subtraction problems to addition problems • Add the opposite following the addition rules 7- 15 2- (-3) 7+ (-15) = -8 2 + 3= 5 -5-3 -5 + (-3) = -8 *you can add the opposite because they are inverse operations and “Undo” each other Key words: withdrawal, descend, loss, lowest, decrease, below

  18. Exit / Closure • Give 3 examples of why it would be important for you to know the how to subtract/ add integers.

  19. Wednesday: Bell Work • -2 + 18 = • Round 67.589 to the nearest tenths • -4 – (-7)

  20. Lesson • Integers with operations: • SPI 0706.2.5 Solve contextual problems that involve operations with integers.

  21. 3. Justify This word actually means….. to give a satisfactory reason for something done / create a viable argument. What does this word mean to you? Explain how you would use this word in math. Examples…

  22. Multiplication Notes • When multiplying 2 integers • If the sign is the same *positive answer • If the sign is different *negative answer + • + = + 6 • 6= 36 - • - = + -2 • -3 = 6 • • + = - -5 • 3 = -15 + • - = - 7 • -2 = -14 Key words: of, times

  23. Multiplying & Dividing Integers + _ _

  24. Division Notes • When dividing 2 integers • If the sign is the same *positive answer • If the sign is different *negative answer + ÷ + = + 8 ÷ 2 = 4 - ÷ - = + -6 ÷ -3 = 2 • ÷ + = - -9 ÷ 3 = -3 + ÷ - = - 4 ÷ -2 = -2 Key words: per, quotient

  25. Exit / Closure • Why is it important to know the difference between a withdrawal and an deposit?

  26. Thursday: Bell Work • 1) 7.2 + 4.31 = • 2) 3 – (-7)= • 3) round to tenths- 2.9547

  27. 4. Quantity This word actually means….. total value of a given group or specific amount. What does this word mean to you? Explain how you would use this word in math. Examples…

  28. Lesson • N2K: SPI 0706.2.5 Solve contextual problems that involve operations with integers • N2K 1

  29. Critical Thinking Activity • 1. Sean has a checking account at USA Bank. He deposited 3 checks, each for $202. He then bought a new video game system for $499. What integer best describes Sean’s current bank account balance? • A) +$107 • B) –$107 • C) +$297 • D) –$297

  30. 1. Denver, Colorado is called “The Mile High City” because its elevation is 5280 feet above sea level. Someone tells you that the elevation of Death Valley, California is −282 feet. • Is Death Valley located above or below sea level? Cite evidence from the paragraph to justify your reasoning. • How many feet higher is Denver than Death Valley? Show your work. • What would your elevation be if you were standing near the ocean? Draw a picture of where you would be standing in comparison to both Denver and Death Valley.

  31. Exit / Closure • What did you learn about today’s N2K? • Do you have questions about the process?

  32. Friday: Bell Work • The man wrote 3 checks ($28.52, $14.38, $31.21). The beginning checking account balance was $423.57. What is his remaining balance.

  33. 5. Coefficient This word actually means….. the number that is multiplied by the variable in an algebraic expression/equation. What does this word mean to you? Explain how you would use this word in math. Examples…

  34. Lesson • Contextual Integers: SPI 0706.2.5 Solve contextual problems that involve operations with integers. • Work on the contextual problems

  35. Exit / Closure • List key words that helped you understand what operation to perform.

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