Order of Operations within Bracket

Study Content

• use grouping symbols as an operator with positive integers

Learning goals

• Understand the impact of bracket in the operation

Working mathematically

• investigate whether different digital technologies, such as those found in computer

software and on mobile devices, apply the order of operations (Problem Solving)

Description of Lesson:

• Orientation [5 mins] – Does anyone remember 3+4*2 in the previous lesson? If you add a bracket , such as (3+4)*2, what will happen?
• Introduction [10 mins] – Introducing BODMAS rule. BODMAS represents brackets, orders, division, multiplication and addition. First, start with anything inside brackets. Second, solve anything involving any index like a power or a square root. Third, calculate division or multiplication. Multiplication and division rank equally, so it doesn’t matter which one go first. (BODMAS=BOMDAS). Last, calculate any addition or subtraction. Subtraction and addition rank equally also, so it doesn’t matter which one solve first. (BODMAS=BOMDAS=BODMSA=BOMDSA)
• Activity 1 [20 mins] – Bingo Activity (4 players)- the teacher to hand out bingo boards and chips and cards for each team.
• Material

White boards and markers

Bingo boards

Bingo chips

Bingo math problem cards

Answer key

• Instruction

Step 1: Each person randomly pick a Bingo board. Shuffle the problem cards and place them face down in the center of the team (Bingo boards and problem cards come from the same set). Place the answer key face down near the pile of cards.

Step 2: Choose the first Bingo Captain.

Step 3: The Bingo Captain flips a problem card. The rest of team write the answer on his or her own white board and turns the board face down when ready.

Step 4: When all boards are face down, the Bingo Captain says “Showdown!” Everyone shows their answers and the Captain checks the answer key. Discuss solutions, talk over incorrect answers, and give help as needed.

Step 5: The person who was correct covers the answer on his or her game board with a Bingo chip. Those who did not have the correct answer may not place a chip on the board.

Step 6: Rotate the role of Bingo Captain to the left for each round.

Step 7: The winner is the first person to cover an entire row horizontally, vertically, or diagonally.

• Activity 2 [10 mins] – Online Practice : http://www.sums.co.uk/original/
• Conclusion [5 mins] – Teacher-led discussion recapping the key learning ideas and highlighting any patterns in bracket in order of bracket. Project a bracket in order of operation song for students.
• Homework- have students complete this BODMAS Worksheet.

Reflection question: Were the questions at the appropriate level?