Mathematical+Reflections,+p+19+0809

M.P. March 21, 2009 Math 8D Mathematical Reflection #1 // 1) A. When an expression involves addition, subtraction, and multiplication, in what order should you perform the operations? // Answer: If an expression involves addition, subtraction, and multiplication you should perform these operations in this order. Multiplication and then which ever comes first from left to right addition and subtraction. // 1)B. Illustrate your answer in part a by writing an appropriate expression and evaluating it for specific values of variables. // Answer: 10 + 30 x 10 – 7 10 + 300 – 7 310 – 7  303 // 2) A. when an expression involves division and other operations such as addition, subtraction, and multiplication, in what order should you perform the operations? // Answer: You should follow the order of this, Parenthesis.Exponets.Division.Multiplication.Adddition.Subtraction. This is called PEDMAS. // 2)B. Illustrate your answer in part a by writing an appropriate expression and evaluating it for specific values of variables. // Answer: 10 + 30 x 10 – 8 ÷ 2 10 + 300 – 8 ÷ 2 10 + 300 – 4  310 – 4  306 // 3) A. When an expression involves exponents and other operations such as addition, subtraction, and multiplication, in what order should you perform the operations? // Answer: You should perform an expression in the following order of PEDMAS. // 3)B Illustrate your answer in part a by writing an appropriate expression and evaluating it for specific values of variables // Answer: 105 + 30 x 10 - 3 100,000 + 30 x 10 – 3 100,000 + 300 – 3 100,300 – 3  100,297   Summary: In this investigation I learned how to answer equations easier. We also learned about the rules of operations. I can now answer algebraic expressions for given vales of the variables.