BIM C1_6_7_1_WritingEquations

7.1 Writing Equations in One Variable
Review & Support

​4 less than number n is 8.

Poll

I can write word sentences as equations.

Ex: The sum of a number (n) and five is eight.

My Learning Standard 6.EE.6

• Not yet!

• I can identify the key words and their meanings.

• I can write word sentences as equations with some support.

• I can write word sentences as equations.

My, "I can..."

• Write an equation from a verbal sentence.

• Translate an equation into a verbal sentence

• Determine if an equation is true by substituting values into the equation.

​The BIG IDEA

Key Ideas

• An expression is a mathematical phrase.

• We can translate a verbal phrase into a mathematical expression.

• Example "a number increased by 4" can be translated into the expression n + 4

​

​What do you KNOW?

Write this as an expression:
$6 dollars less than the cost of an xbox.

Math Response

Write this as an expression: $6 dollars less than the cost of an xbox.

hint: let the letter X represent the item xbox.

Type answer here

Correct Answer: x-6

Deg^°

Rad

Open Ended

Write an equation to represent the situation:

A number decreased by 8 is 12

A number decreased by 8 is 12

• is means =

• "A number decreased by 8" tells us that a number we don't know should be subtracted by 8

• x - 8 =

• The words after the word is, tells us what should be on the right side of the equation. So 12 should be on the right side of the equation.

• x - 8 = 12

Multiple Choice

Ted bought a dolphin poster for $10.  He now has $5.  Which choice models this situation?

• m - 10 = 5

• m - 5 = 10

• m + 5 = 10

• m + 10 = 5

Multiple Choice

Which choice models this situation?
Robyn had some video games, then bought 4 more.  Now she has a total of 10 games.

• v - 4 = 10
• v + 4 = 10
• 10/4 = v
• 4v = 10

Multiple Choice

After dropping 5ºF, the temperature was 37ºF.  Which choice models this situation?

• d - 37 = 5
• d + 5 = 37
• d - 5 = 37
• d + 37 = 5

Multiple Choice

y is equal to twice a number x

• y = 2 + x

• x = 2 + y

• y = 2x

• x = 2y

Math Response

y is equal to x increased by 4

Type answer here

Correct Answer: y=x+4

Deg^°

Rad

Math Response

y is equal to the product of 4 and x

Type answer here

Correct Answer: y=4x

Deg^°

Rad

Multiple Choice

A number minus 10 is fourteen.

• 10 - x = 14

• x - 10 = 14

• x - 10 = 15

• 10 - x = 15

Multiple Choice

The sum of x and 8 is three less than four

• 8x = 3 - 4

• 8x = 4 - 3

• x + 8 = 3 - 4

• x + 8 = 4 - 3

Math Response

5 more than a number x is sixty

Type answer here

Correct Answer: 5+x=60

Deg^°

Rad

Multiple Choice

The sum of 6 and a number is 5 less than forty.

• 6 + x = 5 - 40

• 6x = 40 - 5

• 6 + x = 40 - 5

• 6 + x = 45

Math Response

Two less than a number x is fourteen.

Type answer here

Correct Answer: x-2=14

Deg^°

Rad

Multiple Choice

Five less than a number n is thirty four.

• 5 - n = 36

• n - 5 = 35

• 5 - n = 34

• n - 5 = 34

Multiple Choice

A number minus 9 is twelve.

• x - 9 = 12

• 9 - x = 12

• x - 9 = 13

• 9 - x = 14

Math Response

The sum of x and five is twenty.

Type answer here

Correct Answer: x+5=20

Deg^°

Rad

Math Response

The sum of x and ten is twenty.

Type answer here

Correct Answer: x+10=20

Deg^°

Rad

Multiple Choice

A number five times is twenty five.

• 3x = 25

• 4x = 25

• 5x = 25

• 6x = 24

Multiple Choice

The sum of x and fifteen is fifty six

• x - 15 = 56

• 15x = 56

• x + 15 = 56

• 15x = 55

Poll

I can now write word sentences as equations.

Ex: The sum of a number (n) and five is eight.

My Learning Standard 6.EE.6

• Not yet!

• I can identify the key words and their meanings.

• I can write word sentences as equations with some support.

• I can write word sentences as equations.