Creating and solving equations

Creating and solving equations

Ms Smith's ELT
9.03.20

Poll

What part of word problems do you find most difficult?

• Figuring out what I'm solving for.

• Pulling out the important information.

• Creating the equation.

• Solving the equation for the variable.

• Nothing, I enjoy word problems

Read and think about the following:

Sara has 31 books in her library. She bought several books at a yard sale over the weekend. She now has 54 books in her library. How many books did she buy at the yard sale ?

Multiple Choice

Sara has 31 books in her library. She bought several books at a yard sale over the weekend. She now has 54 books in her library. How many books did she buy at the yard sale ?

What are we solving for? What does the variable represent?

• How many books does she have?

• How many books did she buy at the yard sale?

• How many book did she give away?

Multiple Choice

Sara has 31 books in her library. She bought several books at a yard sale over the weekend. She now has 54 books in her library. How many books did she buy at the yard sale ?

Write an equation that represents the scenario

• 54-31 = x

• 31 + x = 54

• x + 54 = 31

• 54 + 31 = x

Fill in the Blanks

Sara has 31 books in her library. She bought several books at a yard sale over the weekend. She now has 54 books in her library. How many books did she buy at the yard sale ?

Solve. How many books did she buy at the yard sale?

Read and think about the following:

Sam received sixty - three dollars for his birthday. He went to a sporting goods store and bought a baseball glove, baseball, and bat. He had thirty dollars left over, how much did he spent on the baseball gear ?

Fill in the Blanks

Sam received sixty - three dollars for his birthday. He went to a sporting goods store and bought a baseball glove, baseball, and bat. He had thirty dollars left over, how much did he spent on the baseball gear ?

Write an equation to describe the scenario, using "b" for the amount of money spent on baseball gear.

Read and think about the following:

Nancy sold half of her comic books and then bought 7 more. She now has 16. How many did she begin with ?

Multiple Choice

Nancy sold half of her comic books and then bought 7 more. She now has 16. How many did she begin with ?

What equation best represents the scenario?

• $\frac{x}{2}-7\ =\ 30$

• 16 - x = 7

• $\frac{x}{7}+\ 16\ =\ 30$

• $\frac{x}{2}+7=16$

Fill in the Blanks

Nancy sold half of her comic books and then bought 7 more. She now has 16. How many did she begin with ?

Solve and determine how many books did she begin with?

Multiple Choice

Sandy bought a soft drink for 4 dollars and 6 candy bars. She spent a total of 16 dollars. How much did each candy bar cost ?

• $2

• $3

• $2.50

• $1

Multiple Choice

Stonecrest Bike Rental Shop charges a 11 dollar fixed fee plus 6 dollars an hour for renting a bike. Riley paid 41 dollars to rent a bike. How many hours did he pay to have the bike checked out ?

Which equation best represents the scenario?

• 41 = 6(11)

• 6x + 11 = 41

• $\frac{x}{6}+\ 11=\ 41$

• 11 - 6x = 41

Multiple Choice

Stonecrest Bike Rental Shop charges a 11 dollar fixed fee plus 6 dollars an hour for renting a bike. Riley paid 41 dollars to rent a bike. How many hours did he pay to have the bike checked out ?

• 2 hours

• 6 hours

• 5 hours

• 3 hours