EDUC 230 Useful File, Fall 2011

Grade 7 - Order of operations Objectives: Students will be able to:  Know how to deal with operations made of addition, subtraction, multiplication, and division.  Deal with brackets when they are present in the operation.  Solve mathematical operations made of different terms.  Use the calculator to solve numerical operations. Introduction: Provide a definition for “term” in mathematical operations Goal Statement: “Today you will learn how to perform calculations on mathematical operations that consist of different terms made of addition, subtraction, multiplication and/or division, and how to proceed in case brackets are present” Presentation:  Write an operation of two/three terms that consist of addition and subtraction and show that it yields the same answer no matter how you proceed.  Show the same result with an operation made of multiplication and division.  Write another operation made of an addition/subtraction followed by a multiplication/division and show that division/multiplication precedes addition/subtraction.  Write an operation that consists of addition, subtraction, multiplication and division. Introduce brackets to one of the terms, and show that it should be performed first.  Use a calculator for illustration. Practice: Students will perform the task sheet. Recap:  Who can tell me which we should solve first, addition or subtraction? Multiplication or division?  If multiplication and/or division are present with addition and/or subtraction, which term goes first?  Can we discard the presence of brackets in an operation?  How to enter the operation properly on the calculator so as to get the right answer? Task Sheet: 1- Arrange the following in the order of priority in the mathematical operation: Multiplication, Addition, Bracket: ____________________________________________ Subtraction, Division, Bracket: ______________________________________________ 2- Solve the following operations: 3- Check your answers in number 2 using the Calculator