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# Order of Operations (PEMDAS) Calculator

## Enter your Math expression below

❶The first step in the Order of Operations is to simplify parentheses and brackets from the inside out. Now remove the parentheses symbols and simplify addition and subtraction in the order that they appear combine like terms.

## Order of Operations

I want mistakes to be seen as normal and as an important part of learning. I would rather surface those mistakes than try to avoid them. About midway through the warm up I bring their attention to number 3, which I know has been the source of some confusion and, hopefully curiosity. Some of them are so excited to notice this they are acting the expert and sharing their ideas with the group and getting them involved in the problem.

I love the team building! When we go over the warm up I first poll the class to see if they think each problem is true or false, they walk us through the solution. After each of the first two, which are both incorrect, I ask them to imagine what someone might have done in order to arrive at the given wrong answer.

I am hoping that someone who DID arrive at that answer will speak up as the expert who knows what "someone" might have done. In the back of the room I have a large chart paper that is similar to the homework chart they have been working on.

Some of them worked on it over a weekend. They were told ahead of time that they were not expected to be able to complete all of the numbers as there were a few numbers I was unable to come up with myself.

Happily, some students take this as a challenge! Their task today is to check the expressions that they and their "math family" group came up with. When they have agreed that an expression is correct they fill out the team chart, which I make on a different color paper - one for each math family team, and send someone in their group to write it on the class chart in the back of the room while other members continue checking another expression.

I really want groups to keep trying to write expressions for the numbers that their team did not come up with yet. I try to challenge them by saying things like: Each team has a different color marker and periodically I will go check for mistakes on the large chart and go get that team to figure it out.

Students from other teams also notice mistakes and bring them to my attention. When I do white boards I have them all raise their boards at the same time. What that means though is that some students finish earlier than others.

Later in the year I will put up "stretch" problems for them, but this early in the year I want them to get into the practice of helping each other. They instead should be looking to see if they all agree or if they or someone needs help. Students are allowed to begin their homework in class as soon as they get it. I ask the class why they think I did not tell them in the directions to use the correct order of operations. Some will be confused by the word evaluate and need to be reminded that it means to find the value or the answer.

Writing and comparing ratios Unit 6: Proportionality on a graph Unit 7: Percent proportions Unit 8: Exploring Rational Numbers Unit 9: Exploring Surface Area Unit What Were They Thinking?! Number Talk whole number addition. Add to Favorites 1 teachers like this lesson. SWBAT share multiple methods to do mental addition of whole and rational numbers. Big Idea Improving number sense and using number properties. Number Sense and Operations. MP4 Model with mathematics.

MP7 Look for and make use of structure. Warm Up 15 minutes. I display wrong answers that I got by making common expected mistakes on the screen for them to look for in addition to disagreement amongst the group: Number Talk whole number addition 39 minutes. The problem string I used for this first number talk was: Brandon and Cristina share different methods. Angelina starts to let go of her ones. Angelina persists in counting by ones.

Rational Numbers and Integer Practice.

## Main Topics

Enter an equation - the helper breaks the equation into each step required by the order of operations. Unlimited replay and review.

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Homework: Order of Operations · ÷ Use “pemdas” to help simplify each expression. Check your work on a calculator and record keystrokes if your answers do not match each other.