WRITING EXPRESSIONS

• 6.EE.1. 2. Write, read, and evaluate expressions in which letters stand for numbers.

• Objective: Understand how to write expressions based on the context of a situation

• Learning target: Answer at least 3 of the 4 expression questions correctly on the exit ticket.

• What is an expression?

• A mathematical phrase that can have numbers, variables, and operations.

• Examples:x + 67y3a + b - 5 ²

• How do we know which operation to use?

• Add if things are being gained, increased, or combined.

• Subtract if things are being lost/used, decreased, or given/taken away.

• Multiply if there are groups or the same thing happens repeatedly.

• Divide if things are being split up.

• Write an expression to represent the situation:

• I have n boxes, each with 4 papers. How many papers do I have?

• The same thing is happening repeatedly: the first box has 4 papers, the second box has 4, same with the third, and so on.

• Therefore, this is a multiplication situation.

• 4n (or 4×n)

• Write an expression to represent the situation:

• I had j gifts but gave 5 away. How many do I have now?

• I start with j, then lose 5 of them, so this is a subtraction problem.

• j - 5

• 5 – j would NOT be a correct answer. This would be saying I started with 5 gifts and gave away j of them.

• Write an expression to represent the situation:

• 6 friends are going to split the $y food bill equally. How much does each person pay?

• The total amount of $y, so that goes on top.

• Then, it is being split into 6 equal groups, so divide by 6.

• would NOT be a correct answer. This would be saying the total cost was $6 dollars and it is being split up among y people.

• Write an expression to represent the situation:

• I have 7 coins and Bob has b. If we combine them, how many do we have?

• Combining means we are putting together the two amounts, so use addition

• b + 7 (or 7 + b)

• Addition is commutative, meaning you are allowed to switch the order of the terms.

• Write a word problem for:5y

Socrative• Open up Safari or Chrome in your iPad• Go to www.m.socrative.com• For the Room Number, type in: MrPMath• Click “Join Room”• If you did it correctly, your screen should say,

“Waiting for teacher to start next activity”

• y / 7I have y lollipops and split them into 7 equal piles. How many lollipops are in each pile?

• Note: To get to +, press 123 then #+=To get to -, press 123

To get to x, press 123 then #+= and use * instead To get to , press 123 then use / instead

• Q 8 = Q / 8

• h + 24The new table is 24 inches taller than the old one. If the old one is h inches tall, how tall is the new one?

• Note: To get to +, press 123 then #+=To get to -, press 123

To get to x, press 123 then #+= and use * instead To get to , press 123 then use / instead

• Q 8 = Q / 8

• 12 - yA tree had 12 apples before I picked y of them. How many apples are left on the tree?

• Note: To get to +, press 123 then #+=To get to -, press 123

To get to x, press 123 then #+= and use * instead To get to , press 123 then use / instead

• Q 8 = Q / 8

• 2wI get 2 points for every question I answer correctly. If I answer w questions correctly, how many points do I get?

• Note: To get to +, press 123 then #+=To get to -, press 123

To get to x, press 123 then #+= and use * instead To get to , press 123 then use / instead

• Q 8 = Q / 8

Direct Station• We will use whiteboards/Educreations to not only write

expressions but solve them for different values

Collaborative/Skill-Building Station• Go to the Google Form on my staff webpage under

“Links for April 4”

• You will be given an expression and must create your own word problem that fits the expression.

• Example: Create a situation/question that fits the expression h + 23

• If you finish early, there is a second link to practice evaluating expressions.

Independent Station• You will switch back to ST Math’s unit on solving

equations.