All the solutions provided in **McGraw Hill Math Grade 2 Answer Key PDF Chapter 3 Lesson 2 Regroup Ones as Tens**Â will give you a clear idea of the concepts.

## McGraw-Hill My Math Grade 2 Answer Key Chapter 3 Lesson 2 Regroup Ones as Tens

**Explore and Explain**

**Teacher Directions:** Show the number 19 in the chart using base-ten blocks. In the ones column, below the first number, show 3 more ones cubes. Count all of the ones. Make a group of 10. Trade it for a tens rod and place the rod in the tens column. Write the sum. Write how many tens and ones.

Explanation:

**See and Show**

Find 27 + 5.

Step 1

Use and to show 27 and 5.

Step 2

If there are ten or more ones, regroup 10 ones as 1 ten.

Step 3

Write the number of tens and ones.

3 tens 2 ones

27 + 5 = __32__

**Use Work Mat 6 and base-ten blocks to add.**

Question 1.

Answer:

Explanation:

In the sum we have used regrouping

The sum of 15 and 8 is 15 and 8 is 23

Question 2.

Answer:

Explanation:

In the sum we didn’t used regrouping

The sum of 23 and 6 is 29

**Talk Math** How do you know if you need to regroup?

Explanation:

If the ones are more than 9 then we have to regroup.

**On My Own**

**Use Work Mat 6 and base-ten blocks to add.**

Question 3.

Answer:

Explanation:

In the sum we have used regrouping

The sum of 76 and 4 is 80

Question 4.

Answer:

Explanation:

In the sum we have used regrouping

The sum of 17 and 7 is 24

Question 5.

Answer:

Explanation:

In the sum we didn’t used regrouping

The sum of 32 and 6 is 38

Question 6.

Answer:

Explanation:

In the sum we have used regrouping

The sum of 59 and 5 is 64

Question 7.

Answer:

Explanation:

In the sum we have used regrouping

The sum of 13 and 9 is 22

Question 8.

Answer:

Explanation:

In the sum we didn’t used regrouping

The sum of 31 and 8 is 39

Question 9.

Answer:

Explanation:

In the sum we have used regrouping

The sum of 25 and 6 is 31

Question 10.

Answer:

Explanation:

In the sum we didn’t used regrouping

The sum of 62 and 7 is 69

**Problem Solving**

**Use Work Mat 6 and base-ten blocks to solve.**

Question 11.

In April, it rained 18 days. It rained 6 days in May. How many days did it rain in April and May?

____ days

Answer:

24 days

Explanation:

In April, it rained 18 days.

It rained 6 days in May.

18 + 6 = 24

24 days that it rain in April and May.

Question 12.

John sold 17 bottles of water. Later, he soldt8 bottles of water. How many bottles of water did John sell in all?

____ bottles of water

Answer:

25 bottles

Explanation:

John sold 17 bottles of water.

Later, he sold 8 bottles of water.

17 + 8 = 25

25 bottles of water that John sell in all

Question 13.

The runners ate 6 bananas before the race. They ate 14 bananas after the race. How many bananas did the runners eat in all?

____ bananas

Answer:

20 bananas

Explanation:

The runners ate 6 bananas before the race.

They ate 14 bananas after the race.

14 + 6 = 20

20 bananas that the runners eat in all

**Write Math**

Explain how you can regroup 19 + 7 to find the sum.

Explanation:

9 ones and 7 ones is 16

that is 1 ten and 6 ones

19 + 7 = 26

### McGraw Hill My Math Grade 2 Chapter 3 Lesson 2 My Homework Answer Key

**Practice**

**Helpful Hint**

10 ones equals 1 ten.

**Circle the ones to show regrouping ten ones as 1 ten. Draw your answer.**

Question 1.

16 + 5 = ____

Answer:

Explanation:

The sum of 16 and 5 is 21

16 + 5 = 21

Question 2.

18 + 4 = ___

Answer:

Explanation:

The sum of 18 and 4 is 22

**Circle the ones to show regrouping ten ones as 1 ten. Draw your answer.**

Question 3.

14 + 8 = ____

Answer:

22

Explanation:

The sum of 14 and 8 is 22

14 + 8 = 22

Question 4.

15 + 5 = ___

Answer:

20

Explanation:

The sum of 15 and 5 is 20

15 + 5 = 20

Question 5.

Max donated 16 dog collars to the dog shelter. Mia donated 6 leashes. How many items were donated?

_____ items

Answer:

22 items

Explanation:

Max donated 16 dog collars to the dog shelter.

Mia donated 6 leashes.

16 + 6 = 22

22 items were donated

**Vocabulary Check**

**Circle the picture that matches the word.**

Question 6.

Answer:

Explanation:

We can regroup 10 ones to one ten but,

We cannot regroup 4 ones to 4 tens.

**Math at Home** Using toothpicks have your child show you 25 + 5. Ask how many tens there are in the answer.

Explanation:

25 + 5 = 30

there are 3 tens in the answer.