1.2 Operations With Rational Numbers Formulas Page 22 How do you use this to convert 350º F?

1.2 Operations With Rational Numbers Discover the Math Page 22 1 a) Evaluate i) -2 x 4 ii) -9 ÷ 3 iii) -18 ÷ (-6) iv) 10 x (-2) When you multiply or divide two integers with the same sign the result is ……………………. When you multiply or divide two integers with different signs the result is …………………….

1.2 Operations With Rational Numbers Discover the Math Page 23 2 a) Evaluate. Will the answer be negative or positive? a) -3.0 x 0.8 b) -3.6 ÷ 0.9 c) -3.0 ÷ (-0.5) d) 2.0 x (-0.25) 3. Rewrite each expression in question 2 using fractions and evaluate

1.2 Operations With Rational Numbers Part B Mental math Strategies Page Calculate using mental math strategies. a) b) c) 3528 ÷ 7

1.2 Operations With Rational Numbers Part B Mental math Strategies Page Explain how you can mentally evaluate in two different ways

1.2 Operations With Rational Numbers Part C Estimation Strategies Page Estimate. Explain or show how you got your answer.

1.2 Operations With Rational Numbers Page 24

1.2 Operations With Rational Numbers Page 24

1.2 Operations With Rational Numbers Example 2 Apply Rational Numbers (Stock market) Page 25 Stock Sales (100’s) High($) Low($) Close($) Net change Matrix

1.2 Communicate the Key Ideas 1. Which mental math strategy would you use? Page Steve’s Problem What is the first step? What could he do next?

1.2 Check Your Understanding Page 27 A) # 1 Evaluate. Use mental math as much as possible

1.2 Check Your Understanding Page 27 A) # 1 Evaluate. Use mental math as much as possible

1.2 Check Your Understanding Page 27 B) # 1 Evaluate. Use mental math as much as possible

1.2 Check Your Understanding Page 27 B) = = = =

1.2 Check Your Understanding Page 27 # 1 Evaluate. Use mental math as much as possible C)

1.2 Check Your Understanding Page 27 # 1 Evaluate. Use mental math as much as possible C)

1.2 Check Your Understanding Page 27 # 1 Evaluate. Use mental math as much as possible D)

1.2 Check Your Understanding Page 27 # 1 Evaluate. Use mental math as much as possible D) = = = =

Page 27 = = = = = =

1.2 Check Your Understanding Page 27 # 2 Evaluate each expression. Show your work. 2. A

1.2 Check Your Understanding Page 27 # 2 Evaluate each expression. Show your work. B)

1.2 Check Your Understanding Page 27 # 2 Evaluate each expression. Show your work. B)

Page 27 c) # 2 Evaluate each expression. Show your work.

Page 27 c)

Page 27 c)

1.2 Check Your Understanding Page 27 # 2 Evaluate each expression. Show your work. d)

1.2 Check Your Understanding Page 27 # 2 Evaluate each expression. Show your work. d)

1.2 Check Your Understanding Page 27 # 3 Exact or estimate? Explain a) An exact number is required in order to compare the two students. b) An exact number is required in order to compare the two students. c) An exact number is required in order to compare the two students.

1.2 Check Your Understanding # 4 Costa and the old math book.

1.2 Check Your Understanding Page 27 # 4 Costa and the old math book.

1.2 Check Your Understanding Page 27 # 4 iii Costa and the old math book.

1.2 Check Your Understanding Page 27 # 5 Daffodil Campaign So far $ has been raised for this daffodil campaign

1.2 Check Your Understanding Page Complete the Magic Square a)

1.2 Check Your Understanding 6. Complete the Magic Square b) Page 28

1.2 Check Your Understanding Page Skill testing question “Take 15, multiply it by one-half, add three, and subtract two and one-half.” Write an expression for this equation. Is this just a trick?

1.2 Check Your Understanding page 28 Tomas would have made $150 if he sold the 200 shares at the highest price of the day. 9. Celetica Stocks

1.2 Check Your Understanding Page Write problems based on question 9 using each expression.

1.2 Check Your Understanding Page Use decimals for question 11.

1.2 Check Your Understanding Page Use exactly four 4s to get Answers must be exact

1.2 Check Your Understanding Page Formula for the area of a trapezoid is a h b If a = 3.5 units and b = 4.4 units, draw a graph of the area of the trapezoid as the height increase from 1 to 5 units. What pattern do you see?

1.2 Check Your Understanding Page 29 # 15 Evaluate without a calculator.

1.2 Check Your Understanding Page 29 # 15 Evaluate without a calculator.

1.2 Operations With Rational Numbers Order of Operations Page

Grade 9 Math October 2007 Order of Operations

Grade 9 Math October 2007 Order of Operations

Grade 9 Math October 2006 Order of Operations

Order of operation 2

Order of operation 2

Oct 10

2. Page 27

2d. Page 27

3. Page 27

4. Page 27

5. Page 27

5. Page So far $ has been raised for this daffodil campaign

page 28

9.a) page 28

page Find the value of the expression. No calculator. a)

The End