Order of Operations

Order of Operations

Order of OperationsClick the arrow to begin learning about orders of operations. 1

Objectives

Students will learn how to determine which operations should be carried out first, in math problems involving several operations. These will include addition, subtraction, multiplication, division, and parentheses.

Students will learn how to solve a variety of math problems containing various operations.

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33 is correct! Great job! You will learn why this is the correct answer soon. Click the arrow and try the second problem. Home7IntroductionDuring this tutorial, you will be learning about the correct order of operations for solving math problems.Click on the arrow buttons to go through the tutorial. If you get stuck, you can always click on the button to come back to this slide and start over. Good luck and have fun!

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10 is incorrect.Dont worry! For now, that is OK. Click the arrow to learn more about how to solve these problems.

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90 is incorrect.Dont worry! For now, that is OK. Click the arrow and try the next problem. Home6

6 is correct! Great job! You will learn why this is the correct answer soon. Click the arrow to learn more about how to solve these problems.

Home9Order of OperationsWhat is an operation?Lets start out with reviewing what an operation is. In math, operations are the things we do with numbers (adding, subtracting, multiplying, dividing). These are represented using symbols:

- +Home10Order of OperationsWhat does that mean? When you are solving a math problem, you have to do each operation in a specific order.

This might seem like a silly rule, but if you do not follow it you will not get the correct answer. Home11How does it work? Now that you know what Order of Operations means, you are going to learn some rules about solving problems. Then, you are going to practice solving some math problems.

Home12Rule 1You must always solve a math problem from left to right, just like when you are reading a word. Go to the next page to see an example.

Home1312-5+6=?

Look at the problem above. If I added 5 and 6 first, this is what I would get:

12-5+6=? I would add the 5 and 6, which equals 11. I would put the 11 in place of the 5+6. Now I have this problem: 12-11= ?The answer is 1. I did not solve the problem from left to right. Lets see what happens if I do.

Home1412-5+6=?If I start from the left, and do the subtraction first, this is what I would get:

12-5+6=1I would subtract 5 from 12 first, which equals 7. I would put the 7 in place of the 12-5.

7+6= ?The answer is 13 this time. This is the correct answer, because I followed the rule and solved the problem from left to right. Click Try it! to try a problem on your own.

Try it!Home15Now you try!Solve this problem from left to right. Use scratch paper if you need to.

15-3+2=?

Which answer is correct?

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14Home16Rule 2Multiplication and division always have to be done before subtraction and addition. You still need to remember to solve the problem from left to right too!Multiplication and division are solved from left to right first.Addition and subtraction are solved from left to right next. Go to the next slide to see an example.

Home209-42+2=?If I solve the problem from left to right without doing the multiplication first, this is what happens:9-42+2=?I subtract 4 from 9 first and get 5. I put the 5 in place of the 9-4. 52+2=?Then, I multiply 5 and 2 to get 10. I put the 10 in place of the 52, and now I need to finish up my problem. 10+2=12My answer is 12. Lets see what happens when we do the multiplication first. Click the arrow to find out.

Home219-42+2=?If I solve the multiplication part of the problem first, this is what happens:9-42+2=?I multiply 4 and 2 first and get 8. I put the 8 in place of the 42. 9-8+2=?Now, since I only have addition and subtraction left, I do those operations from left to right. I subtract 8 from 9, and get 1. I put the 1 in the place of 9-8. 1+2=3My answer is 3. This is the correct answer, because I followed the order of operations. Click Try it! to try some problems on your own.

Try it!Home2215-52+6=?Solve the problem above. Use a paper and pencil if needed. Click on the correct answer below.

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Home23You are Correct!You solved the problem correctly. Great job! If you guessed the answer, this is how the problem should be solved. Check your work, or try this.

15-52+6=? The multiplication should be done first.

15-10+6=? Next, complete the addition and subtraction from left to right.

5+6=?5+6=11

Home24Click the arrow to go back and try the problem again.

Sorry, that answer is incorrect. Remember that you must do the multiplication and division operations first (from left to right). Then you can complete the addition and subtraction from left to right.

Home27Parenthesis ()So far, you have learned:Solve problems from left to right.Division and multiplication must be done first (from left to right).Addition and subtraction is done next (from left to right).What about when there are parentheses?Push the question mark to find out. Home29Rule 3Operations in parentheses always have to be done first. You still need to remember to solve the problem from left to right too!All operations in parentheses are done from left to right first. Multiplication and division are solved from left to right next.Addition and subtraction are solved from left to right last. Go to the next slide to see an example.

Home305(4+3)-2=?The operations in parentheses must be done first. 5(4+3)-2=? (4+3) is 7, so put 7 in place of it. 57-2=?Since there are no more parentheses, I can do all of the multiplication and division next. 57 is 35, so I put 35 in place of that. 35-2=?I finish the problem by doing the addition and subtraction.35-2=33

Home31To see another example, click the orange arrow. To practice some problems on your own, click the green arrow.

Home3225+(63)=?First, you need to complete the operations in the parentheses. 25+(63)=?(63) is 2, so put the 2 in place of it. 25+2=?Multiplication and division are next, so solve 25. This equals 10, so put 10 in the problem. 10+2=?Last, you can do the addition and subtraction. 10+2=12

Home33You are Correct! If you guessed the correct answer, click the arrow to go back and try to get the correct answer on your own.

If you successfully solved the problem, click the arrow to go back and try the next one.

Home35Congratulations!You have just completed the Order of Operations lesson!

Give your work from the last 3 problems to your teacher.

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