We included **HMH Into Math Grade 3 Answer Key PDF** **Module 11 Understand Perimeter **to make students experts in learning maths.

## HMH Into Math Grade 3 Module 11 Answer Key Understand Perimeter

How far will the ant have to walk to reach the anthill?

Measure the length of each part of the path to the nearest centimeter.

First, walk __________ centimeters to the right.

Next walk __________ centimeters down.

Then, walk __________ centimeters to the right.

Finally, walk _________ centimeters up.

Answer:

First, walk 10 centimeters to the right.

Next walk 5 centimeters down.

Then, walk 2 centimeters to the right.

Finally, walk 7 centimeters up.

**Turn and Talk**

How can you find the total distance the ant has to walk?

Answer: 24 cm

Explanation:

10 + 5 + 2 + 7 = 24 cm

**Are You Ready?**

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

**Add Three Numbers**

Find the sum. Circle the addends you add first.

Question 1.

2 + 1 + 8 = __________

Answer:

2 + 1 + 8 = 11

Explanation:

8 and 2 makes 10

so, added them first

8 + 2 = 10

10 + 1 = 11

Question 2.

5 + 4 + 6 = ___________

Answer:

5 + 4 + 6 = 15

Explanation:

6 and 4 makes 10

so, added them first

6 + 4 = 10

10 + 5 = 15

Question 3.

3 + 8 + 7 = ___________

Answer:

3 + 8 + 7 = 18

Explanation:

7 and 3 makes 10

so, added them first

7 + 3 = 10

10 + 8 = 18

**Add and Subtract Lengths in Inches**

Question 4.

Theo draws a line that is 31 inches long. He erases 14 inches of the line. How long is his line now? Show the problem using the number line. Write an equation. Solve.

_______ ________ = __________

Theo’s line is _________ inches long.

Answer:

31 – 14 = 17

Theo’s line is 17 inches long.

**Add and Subtract Lengths in Centimeters**

Question 5.

Mari makes a row of blocks that is 19 centimeters long. Then she adds a row that is 16 centimeters long. How long are the two rows of blocks? Show the problem using the number line. Write an equation. Solve.

The two rows of blocks are _________ centimeters long.

Answer:

The two rows of blocks are 35 centimeters long.