We included **HMH Into Math Grade 4 Answer Key**** PDF** **Module 4 Mental Math and Estimation Strategies **to make students experts in learning maths.

## HMH Into Math Grade 4 Module 4 Answer Key Mental Math and Estimation Strategies

**How large is the room?**

- The adoption room at a local animal shelter has four visiting spaces.
- Two of the four visiting spaces have tiled floors. Each tile has an area of 4 square feet.

- What is the area of the adoption room?

**Turn and Talk**

- What strategy did you use to find the area? Explain each step.
- The manager of the animal shelter wants to separate the adoption room into 3 equal sections for an event. How can you find the area of each section?

**Are You Ready?**

**Complete these problems to review prior concepts and skills you will need for this module.**

**Multiplication and Division Related Facts**

**Write the related facts for the array.**

Question 1.

Answer:

Explanation:

Rows x columns

Columns x Rows

**Meaning of Division: Equal Groups**

**Complete the table. Use counters to help.**

Question 2.

Answer:

Explanation:

By using the counters completed the table

15 Ã· 3 = 5

Question 3.

Answer:

Explanation:

20 Ã·Â 2 = 10

By using the counters completed the table

Question 4.

Answer:

Explanation:

6 Ã·Â 3 = 2

By using the counters completed the table

Question 5.

Answer:

Explanation:

12 Ã·Â 3 = 4

By using the counters completed the table

Question 6.

Answer:

24 Ã·Â 6 = 4

Explanation:

By using the counters completed the table

Question 7.

Answer:

42 Ã·Â 6 = 7

Explanation:

By using the counters completed the table

Question 8.

Answer:

Explanation:

72 Ã· 8 = 9

By using the counters completed the table

**Unknown Factors**

**Find the unknown factor.**

Question 9.

8 Ã— ___ = 40

Answer:

8 Ã— 5 = 40

40 Ã· 8 = 5

Explanation:

Division is done to find the unknown factor

Question 10.

___ Ã— 9 = 36

Answer:

4 Ã— 9 = 36

36 Ã· 9 = 4

Explanation:

Division is done to find the unknown factor

Question 11.

8 = ___ Ã— 4

Answer:

8 = 2 Ã— 4

8 Ã· 2 = 4

Explanation:

Division is done to find the unknown factor

Question 12.

35 = 5 Ã— ___

Answer:

35 = 5 Ã— 7

35 Ã· 5 = 7

Explanation:

Division is done to find the unknown factor

Question 13.

7 Ã— ___ = 21

Answer:

7 Ã— 3 = 21

21 Ã· 3 = 7

Explanation:

Division is done to find the unknown factor

Question 14.

4 Ã— ___ = 16

Answer:

4 Ã— 4 = 16

16 Ã· 4 = 4

Explanation:

Division is done to find the unknown factor