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7 questions

7 questions. What grades should students use strategies to estimate computations involving fractions and decimals in situations relevant to students’ experience?

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7 questions

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  1. 7questions • What grades should students use strategies to estimate computations involving fractions and decimals in situations relevant to students’ experience? • What grades should they select appropriate methods and tools for computing with fractions and decimals from among mental computation, estimation, calculators, computers, paper and pencil depending the situation?

  2. What is the most common regional model for base ten fractions? Why? • What is the best length model? Why? • Should teachers use money as a model for new students to decimals? • T or F • Realistic percent problems are the best way to assess a students understanding of percent. • Many teachers use money as a model.

  3. Developing Concepts of decimals and percents • SPI 0406.2.6 Use the symbols < , > and = to compare common fractions and decimals in both increasing and decreasing order. • SPI 0406.2.9 Add and subtract decimals through hundredths • SPI 0606.2.5 Transform numbers from one form to another (fractions, decimals, percents, and mixed numbers).

  4. Virtual Games • http://www.shodor.org/interactivate/activities/FractionQuiz/ • http://www.mathplayground.com/Decention/Decention.html

  5. Bingo

  6. Base 10

  7. Grocery Ad

  8. Introducing Percents • Pg. 340 in the book.

  9. Jacquie’s Shoes

  10. Cost $59.99

  11. Total Cost • $59.99 - shoes • $ - tax of 9.25% • $ - Grand Total

  12. Problem • Jacquie has only $40.00 • So Jacquie waits.

  13. And waits.

  14. Finally Her shoes that she has waited for has finally went on sale. 20% off of $59.99 is Jacquie has $60.00 now. How much will she pay for the shoes now? Don’t forget tax.

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