Order of Operation

Order of Operation

by Venus Daydayan

​Brain teaser

What is shown in the video?​

​

Open Ended

Why do we always have rules at home, at school and also in solving problems?

Multiple Choice

Simplify the expression 6 + 3 x 2 -5.

which of the following is the correct answer

• 6+3 x 2 -5

  =(6+3) x 2 -5

  =9 x 2 -5

  =18-5

  =13

  add, multiply, subtract

• 6+3 x 2 -5

  = (6+3) x (5x2)

  =9 x 3

  =27

  add, subtract,multiply

• 6+3 x 2 -5

  =6 + (3x2) - 5

  =12 - 5

  = 7

  multiply, add,subtract

• None of the above

​Things to remember

• ​Multiplication and division take a higher priority than addition and subtraction.

• ​All multiplication and division must be performed first, from first to right order.

• ​When all multiplication anddivision is done, perform addition and subtraction from left to right.

​Solve: 36 + 16 2 x 3 - 7

​Solve: 45 - 5 x 8 4 + 9

Poll

Guided practice page 25.

Mark your answer in the book.

Reflect the date also.

Solve:  1.  5 - 2 + 4 x 2

• 11

• 14

Poll

2.    $$4\ +\ 3\times\ 2\ +3$$  

• 13

• 15

Poll

3. $$5\ +\ 5\ +\ 4\ \times4$$  

• 26

• 56

Multiple Choice

4.   $$3\times2+16\div2$$  

• 11

• 14

Multiple Choice

5. $$15\div3\ +2\times4$$  

• 13

• 28

​Guide Practice B

Which of the following is correct. Put a parenthesis to make each statement correct.

​Guide Practice B

Which of the following is correct. Put a parenthesis to make each statement correct.

Multiple Choice

5. Which statement or equation is correct?

• $$15\div\left(3+2\right)-2\ =1$$  

• $$\left(15\div3\right)\ +2-2\ =1$$  

Multiple Choice

6. Which statement or equation is correct?

• $$14\div\left(5\times4\right)\div\left(2+15\right)\ =2$$  

• $$\left(14+5\times4\right)\div\left(2+15\right)\ =2$$  

Multiple Choice

7. Is the equation or statement below correct?

$$8\div8+7\times3-4=18$$  

• Yes

• No

Multiple Choice

Think and Answer A.

Write the correct number to make each statement true. Remember the correct series of operations.

1. $$14-4\times$$   __ = 6

• 2

• 3

Multiple Choice

2. $$35\div$$   __ $$-3\ =2$$  

• 4

• 7

Multiple Choice

3.. $$6\ +$$   __  $$\div4\ -2=6$$   

• 24

• 8

Multiple Choice

4. $$3+4\ \times\$$  __ -10 = 17

• 6

• 9

Multiple Choice

5. __ $$\div\left(4\ +2\right)-4=1$$  

• 45

• 30

Poll

B. Solve the problem step by step.

A craftsman makes suit for the army. If takes him 6 days to make a regular suit and 9days to make a battle suit. If in a day he can only make a regular suit or a battle suit( but not both0, how long would it take him to make 4 regular suites and 10battle suits.

• 110 days

• 114 days

• 116 days

​Solution:

Poll

2. Sir  Patrick and his aide Jade could travel 12miles in a day. They were traveling from Gaul heading to Rome, which is 600 miles away. a big flood blocked their path so they had to wait 4 days for conditions to improve before they could continue. a band of outlaws attacked them and stopped their travel for another 2 days. How many days in all did it take them to get from Gaul to Rome.

• 50 days

• 54 days

• 56 days

It is important to follow rules and order to arrive at a common answer.​