Mrs. Cardinal - Lesson 8.7 (Part 1)

​8.7 Writing Inequalities (Part 1)

​🎯 I can write an inequality from a word phrase
🎯 I can determine if a value is a solution to an inequality

​A sign says, you must be AT LEAST 3 feet tall to ride the ride at the fair.

​At least 3 FT. to ride!

1. ​Think of the height of person who can ride the ride.

2. Think of the height of a person who can't ride the ride

Multiple Select

You must be at least 3 feet tall to ride. Who can ride? (Select all)

• Olivia

  4' 0"

• Jason

  3' 5"

• Maddy

  3' 0"

• Brayden

  2' 9"

Your mom says you can have AT MOST 4 friends at your sleepover birthday party.

1. ​Can you have 4 friends over?

2. Can you have 3 friends? 2? 1?

3. Can you have 5 friends over?

Open Ended

Write what AT MOST and AT LEAST mean to you, in your own words.

​🎯 Write an inequality from a word phrase

​An inequality is a math sentence that compares two things. An inequality uses these symbols:

​< less than
> greater than
≤ less than or equal to
≥ greater than or equal to

​Example:

Multiple Choice

Write the word sentence as an inequality.

n is greater than 1

• n ≤ 1

• n < 1

• n > 1

• n ≥ 1

Multiple Choice

Write the word sentence as an inequality.

Two times p is fewer than 7

• 2p < 7

• 2p > 7

• 2p ≤ 7

• 2p ≥ 7

Multiple Choice

Write the word sentence as an inequality.

w minus 3 is less than or equal to 10

• w - 3 < 10

• w - 3 > 10

• w - 3 ≤ 10

• w - 3 ≥ 10

🎯 Determine if a value is a solution to an inequality

​A solution to an inequality is a number that makes the sentence true.

​Yes! The value 3 is one of the solutions to this inequality!

​What other numbers would work? What numbers would not work?

Multiple Select

Select all the numbers that are solutions for this inequality:

x + 1 > 8

• 6

• 7

• 8

• 9

Multiple Choice

Tell whether 3 is a solution of the inequality.

b + 4 < 6

• Yes. 3 is a solution.

• No. 3 is not a solution.

Multiple Choice

Tell whether 3 is a solution of the inequality.

9 − n ≥ 6

• Yes. 3 is a solution.

• No. 3 is not a solution.

Multiple Choice

Tell whether 3 is a solution of the inequality.

18 ÷ x ≥ 10

• Yes. 3 is a solution.

• No. 3 is not a solution.

Poll

I can write an inequality from a word phrase.

• Yes! I get it!

• Sort of. I have questions/need practice

• No. I do not understand.

Poll

I can tell if a value is a solution to an inequality.

• Yes! I get it!

• Sort of. I have questions/need practice

• No. I do not understand.