Copyright © Swun Math Grade 6 Unit 5 Lesson 21 P SJ
MPs
Applied MP
* Embedded MP
Procedural Lesson
Grade 6 · Unit 5 · Lesson 21
MC: 6.EE.5, 6.EE.8
1 2 3 4 5 6 7 8
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Steps:
1. Substitute given values into inequality.
2. Determine whether the solution makes
the inequality true or false.
Vocabulary Notes
Inequality: math statement comparing two
unequal values
Solution: a number that makes an equation
or inequality true
Infinite: limitless, endless
Copyright © Swun Math Grade 6 Unit 5 Lesson 21 P SJ
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Directions: Determine the solution(s) that make the inequality true.
1. Which values for
a
are solutions to the inequality?
16 +
a
> 21;
a
= 5, 6, 7
2. At the movie theater, Tom’s mom said he could have one treat but it had to
be less than $5.00. The menu offered the following items:
Which of the treats were options for Tom? Why?
Write the inequality statement.
Treats Price
Popcorn $3.99
Candy $5.49
Soda $4.89
Ice Cream $4.99
Pretzel $5.99
Hot Dog $2.99
MP3: How will you test to see if your inequality works?
MP4: How might it help to create a visual?
Copyright © Swun Math Grade 6 Unit 5 Lesson 21 P SJ
Directions: Determine the solution(s) that make the inequality true.
1. Which values for x are solutions to the inequality?
4x > 12;
x
= 2, 3, 9
2. Last week, the local weatherman predicted that the low temperatures for
the week would not be less than zero degrees. The table shows the actual
low temperature recorded each day.
On what days of the week was the
weatherman’s prediction correct?
Write the inequality statement.
Day Low Temp
Sunday -
Monday
Tuesday
Wednesday -
Thursday
Friday -
Saturday
Copyright © Swun Math Grade 6 Unit 5 Lesson 21 P SJ
Name: ____________________________
Date: ______________________________
1. Which values for
t
are solutions to the inequality?
9
t
> 5;
t
= 6, 4, 2, 1
2. Which values for
m
are solutions to the inequality?
m
+ 5 < 12;
m
= 4, 7, 10
3. Which values for
w
are solutions to the inequality?
w
4 < 20;
w
= 10, 20, 30
Directions: Determine the solution(s) that make the inequality true.
Copyright © Swun Math Grade 6 Unit 5 Lesson 21 P SJ
4. Which values for
r
are solutions to the inequality?
18 +
r
> 25;
r
= 6, 7, 8
5. Which values for
j
are solutions to the inequality?
j
+ 4.2 < 6.25;
j
= 2.0, 2.05, 2.5
6. Luigi recorded the number of sandwiches sold in his deli on Tuesday. If
he sells more than 20 of a particular sandwich, he orders more meat.
Which meats does Luigi need to order?
Write the inequality statement.
Sandwich Number Sold
Ham 21
Turkey 19
Roast Beef 23
Chicken 20
Copyright © Swun Math Grade 6 Unit 5 Lesson 21 P SJ
1. Which numbers satisfy the given inequality?
2. Which numbers satisfy the given inequality?
5 +
m
+ 1 < 10;
m
= 2, 6, 9
Extension Activity
*
MP4: Apply mathematics in everyday life.
If
a
>
b
and
b
>
c
, what is true about
a
and
c
? Use examples and explain your
reasoning.
Directions: Read and answer each question.
x +
2
> 1
1
; x =
2
,
1 3
,
3 3 3 2 4
Copyright © Swun Math Grade 6 Unit 5 Lesson 21 P SJ
Recap today’s lesson with one or more of the following questions:
MP3: How will you test to see if your inequality worked?
MP4: How might it help to create a visual?
Reaching Consensus
*MP3: Do you agree/disagree with what said?
Student Presentations
*MP6: How do you know your answers are correct/reasonable?
Copyright © Swun Math Grade 6 Unit 5 Lesson 21 P SJ