Engage NY Eureka Math Grade 6 Module 4 Lesson 24 Answer Key
Eureka Math Grade 6 Module 4 Lesson 24 Opening Exercise Answer Key
Opening Exercise:
State whether each number sentence is true or false. If the number sentence is false, explain why.
a. 4 + 5 > 9
Answer:
False. 4 + 5 is not greater than 9.
b. 36 = 18
Answer:
True
c. 32 > \(\frac{64}{4}\)
Answer:
True
d. 78 – 15 < 68
Answer:
True
e. 22 ≥ 11 + 12
Answer:
False. 22 is not greater than or equal to 23.
Eureka Math Grade 6 Module 4 Lesson 24 Example Answer Key
Example 1:
Write true or false if the number substituted for g results in a true or false number sentence.
Answer:
Example 2:
State when the following equations/inequalities will be true and when they will be false.
a. r + 15 = 25
Answer:
→ Can you think of a number that will make this equation true?
Yes. Substituting 10 for r will make a true number sentence.
→ Is 10 the only number that results in a true number sentence? Why or why not?
Yes. There is only one value that, if substituted, will result in a true number sentence. There is only one number that can be added to 15 to get exactly 25.
→ What will make the number sentence false?
Any number that is not 10 will result in a false number sentence.
→ If we look back to the original questions, how can we state when the equation will be true? False?
The equation is true when the value substituted for r is 10 and false when the value of r is any other number.
b. 6 – d > 0
Answer:
→ If we wanted 6 – d to equal 0, what would the value of d have to be? Why?
The value of d would have to be 6 because 6 – 6 = 0.
→ Will substituting 6 for d result in a true number sentence? Why or why not?
If d has a value of 6, then the resulting number sentence would not be true because the left side has to be greater than 0, not equal to 0.
→ How about substituting 5 for d? 4? 3? 2?
Yes. Substituting any of these numbers for d into the inequality results in true number sentences.
→ What values can we substitute for d in order for the resulting number sentence to be true?
The inequality is true for any value of d that is less than 6.
→ What values for d would make the resulting number sentence false?
The inequality is false for any value of d that is greater than or equal to 6.
→ Let’s take a look at a number line and see why these statements make sense.
Display a number line on the board. Label the number line as shown below.
→ Let’s begin at 6. If I were to subtract 1 from 6, where would that place be on the number line?
5
→ So, if we substitute 1 for d, then 6 – 1 = 5, and the resulting number sentence is true. How about if I subtracted 2 from 6? Would our number sentence be true for the value 2?
Yes
→ What if I subtracted 6 from the 6 on the number line? Where would that be on the number line?
0
→ So, if we substitute 6 for d, will the resulting number sentence be true or false?
False
→ Let’s try one more. We have already determined that any number greater than or equal to 6 will result in a false number sentence. Let’s try a number greater than 6. Let’s try the number 7.
→ Start with the 6 on the number line. If we were to subtract 7, in which direction on the number line would we
move?
To the left
→ And how many times will we move to the left?
7
→ Model beginning at 6 on the number line, and move a finger, or draw the unit skips, while continually moving to the left on the number line 7 times.
→ So, it seems we have ended up at a place to the left of O. What number is represented by this position?
-1
c. \(\frac{1}{2}\)f = 15
Answer:
The equation is true when the value substituted for fis 30 (f = 30) and false when the value off is any other number (f ≠ 30).
d. \(\frac{y}{3}\) < 10
Answer:
The inequality is true for any value of y that is less than 30 (y < 30) and false when the value of y is greater than or equal to 30 (y ≥ 30).
e. 7g ≥ 42
Answer:
The inequality is true for any value of g that is greater than or equal to 6 (g ≥ 6) and false when the value of g is less than (g < 6).
f. a – 8 ≤ 15
Answer:
The inequality is true for any value of a that is less than or equal to 23 (a ≤ 23) and false when the value of a is greater than 23 (a > 23).
Eureka Math Grade 6 Module 4 Lesson 24 Exercise Answer Key
Exercises:
Complete the following problems in pairs. State when the following equations and inequalities will be true and when they will be fake.
Exercise 1.
15c > 45
Answer:
The inequality is true for any value of c that is greater than 3 (c > 3) and false when the value of c is less than or equal to (c ≤ 3).
Exercise 2.
25 = d – 10
Answer:
The equation is true when the value of d is 35 (d = 35) and false when the value of d is any other number (d ≠ 35).
Exercise 3.
56 ≥ 2e
Answer:
The inequality is true for any value of e that is less than or equal to 28 (e ≤ 28) and false when the value of e is greater than 8 (e > 28).
Exercise 4.
\(\frac{h}{5}\) ≥ 12
Answer:
The inequality is true for any value of h that is greater than or equal to 60 (h ≥ 60) and false when the value of h is less than (h < 60).
Exercise 5.
45 > h + 29
Answer:
The inequality is true for any value of h that is less than 16 (h < 16) and false when the value of h is greater than or
equal to 16 (h ≥ 16).
Exercise 6.
4a ≤ 16
Answer:
The inequality is true for any value of a that is less than or equal to 4 (a ≤ 4) and false when the value of a is greater than (a > 4).
Exercise 7.
3x = 24
Answer:
The equation is true when the value of x is 8 (x = 8) and false when the value of x is any other number (x ≠ 8).
Identify all equality and inequality signs that can be placed into the blank to make a true number sentence.
Exercise 8.
15 + 9 ___ 24
Answer:
= or ≥ or ≤
Exercise 9.
8.7 ___ 50
Answer:
> or ≥
Exercise 10.
\(\frac{15}{2}\) ___ 10
Answer:
< or ≤
Exercise 11.
34 ___ 17 . 2
Answer:
= or ≥ or ≤
Exercise 12.
18 ___ 24.5 – 6
Answer:
< or ≤
Eureka Math Grade 6 Module 4 Lesson 24 Problem Set Answer Key
State when the following equations and inequalities will be true and when they will be false.
Question 1.
36 = 9k
Answer:
The equation is true when the value of k is 4 and false when the value of k is any number other than 4.
OR
The equation is true when k = 4 and false when k ≠ 4.
Question 2.
67 > f – 15
Answer:
The inequality is true for any value off that is less than 82 and false when the value of f is greater than or equal to 82.
OR
The inequality is true when f < 82 and false when f ≥ 82.
Question 3.
\(\frac{v}{9}\) = 3
Answer:
The equation is true when the value of v is 27 and false when the value of v is any number other than 27.
OR
The equation is true when v = 27 and false when v ≠ 27.
Question 4.
10 + b > 42
Answer:
The inequality is true for any value of b that is greater than 32 and false when the value of b is less than or equal to 32.
OR
The inequality is true when b > 32 and false when b ≤ 32.
Question 5.
d – 8 ≥ 35
Answer:
The inequality is true for any value of d that is greater than or equal to 43 and false when the value of d is less than 43
OR
The inequality is true when d ≥ 43 and false when d <43.
Question 6.
32f < 64
Answer:
The inequality is true for any value of f that is less than 2 and false when the value off is greater than or equal to 2.
OR
The inequality is true when f < 2 and false when f ≥ 2.
Question 7.
10 – h ≤ 7
Answer:
The inequality is true for any value of h that is greater than or equal to 3 and false when the value of h is less than 3.
OR
The inequality is true when h ≥ 3 and false when h < 3.
Question 8.
42 + 8 ≥ g
Answer:
The inequality is true for any value of g that is less than or equal to 50 and false when the value of g is greater than 50.
OR
The inequality is true when g < 50 and false when g > 50.
Question 9.
\(\frac{m}{3}\) = 14
Answer:
The equation is true when the value of m is 42 and false when the value of m is any number other than 42.
OR
The equation is true when m = 42 and false when m ≠ 42.
Eureka Math Grade 6 Module 4 Lesson 24 Exit Ticket Answer Key
State when the following equations and inequalities will be true and when they will be false.
Question 1.
5g > 45
Answer:
The inequality is true for any value of g that is greater than 9 and false when the value of g is less than or equal to 9.
OR
The inequality is true when g > 9 and false when g ≤ 9.
Question 2.
14 = 5 + k
Answer:
The equation is true when the value of k is 9 and false when the value of k is any other number.
OR
The equation is true when k = 9 and false when k ≠ 9.
Question 3.
26 – w < 12
Answer:
The inequality is true for any value of w that is greater than 14 and false when the value of w is less than or equal to 14.
OR
The inequality is true when w > 14 and false when w < 14.
Question 4.
32 ≤ a + 8
Answer:
The inequality is true for any value of a that is greater than or equal to 24 and false when the value of a is less than 24.
OR
The inequality is true when a ≥ 24 and false when a < 24.
Question 5.
2 . h ≤ 16
Answer:
The inequality is true for any value of h that is less than or equal to 8 and false when the value of h is greater than 8.
OR
The inequality is true when h < 8 and false when h > 8.