Writing Equations 6.EE.7

Writing Equations 6.EE.7

Yesterday

We discussed word problems and how to identify the correct equation.

Let's see what you remember..

Multiple Choice

Lotsa Boats requires a payment of $15 an hour for each hour for which the boat is rented.

Write an equation that could be used to find the number of hours the Johnsons rented the boat for if their payment was $125.

• 
  

  $15\div h=125$

• $125\ \div\ 15\ =\ h$

• $15h=125$

• $15+h=125$

Multiple Choice

Tom Brown Park is 125.5 acres larger than Winthrop Park. Tom Brown Park is 255 acres.

Write an equation that could be used to find the number of acres in Winthrop Park.

• 
  

   $125.5\div w=255$ 

•  $w+125.5=255$ 

•  $125.5w=225$ 

•  $w-225=125$ 

Let's breakdown an Equation

Time for some notes!

Parts of an Equation

• Given Information

• Unknown

• Operation

• Total

The Total

ALWAYS goes on one side of the equal sign by itself.

The variable

is NEVER by itself

Let's see what you know..

Multiple Choice

True or False:

w + 125.5 = 255

255 is the total

• True

• False

Multiple Choice

Which equation makes sense of the situation?

Gavin’s mom gives him $22.50 for his allowance each month. Last month, Gavin bought a cheeseburger with his allowance. He had $18.22 left.

• 18.22 + c = 22.50

• 22.50 + c = 18.22

Multiple Choice

What number represents the total?

Jameel is 10 inches taller than his sister. His sister is 47 inches tall. Which equation could be used to find h, Jameel’s height?

• 10

• 47

Multiple Choice

Which equation makes sense of the situation?

Jameel is 10 inches taller than his sister. His sister is 47 inches tall. Which equation could be used to find h, Jameel’s height?

• h - 10 = 47

• h - 47 = 10

Multiple Choice

Jessica made 13 paper flags. Kevin made 4 more flags than Jessica. If n represents the number of flags Kevin made, which equation can be used to find the number of flags Kevin made?

• 
  

  $n-4=13$

• $4-n=13$
  

• $13-4=n$

• $4n=13$

Multiple Choice

The pay for Marvin’s job is dependent upon the number of hours he works. He charges 7.5 per hour and was paid $45. How many hours did Marvin work?

Which equation represents the situation?

• $7.5+45=h$

• $7.5h=45$

• $45\div7.5=h$

• $45h=7.5$

Be careful!

Writing Equations & Solving Equations are DIFFERENT.

Writing Equations:

In 6 more years, Turk will be 18 years old. Use the number sentence to determine how old Turk is now (n).

Solving Equations:

In 6 more years, Turk will be 18 years old. Use the number sentence to determine how old Turk is now (n).

Remember,

You need to write the equation BEFORE you can solve it. They work TOGETHER.

Let's try to WRITE the equation

by using the OPPOSITE of how we would solve it.

Multiple Select

Shelly borrowed $20 from her dad to buy a new CD player. She has paid back $17. Which equation could be used to find x, the amount she still owes her dad?

Select the equation, 
then select what operation you would use to solve it.

• solve with addition

• equation:  $x+17=20$  

• equation:  $20-17=x$  

• solve with subtraction

• equation:  $x-17=20$  

Multiple Select

Justin has read 89 pages of a novel. He has 214 pages to go. Let p represent the number of pages in the entire book.

Select the equation, 
then select what operation you would use to solve it.

• solve with addition

• equation:  $p+89=214$  

• equation:  $p-89=214$  

• solve with subtraction

• equation:  $214-89=p$  

Multiple Select

Paul’s Plumbing charges $60 per hour. The total cost of a particular visit was $295. Write an equation that could be used to find the number of hours, h, the plumber worked.

Select the equation, 
then select what operation you would use to solve it.

• solve with division

• equation:  $60\div h=295$  

• equation:  $60h=295$  

• solve with subtraction

• solve with multiplication

Multiple Select

A family went on a bicycle trip. They rode their bicycles for 3 days, and each day they went 34 miles. Write and solve an equation that the family could use to find the total number of miles (m) they rode.

Select the equation, 
then select what operation you would use to solve it.

• solve with division

• equation:  $m\div3=34$  

• equation:  $3m=34$  

• equation:  $34\cdot3=m$  

• solve with multiplication

Poll

How do you feel about Writing Equations?

• Oh, I got this.

• Better than yesterday!

• I am still forgetting to do the opposite of how I would solve it

• I am so so lost

• I logged in but not participating.