# McGraw Hill My Math Grade 2 Chapter 1 Lesson 5 Answer Key Add Three Numbers

All the solutions provided in McGraw Hill Math Grade 2 Answer Key PDF Chapter 1 Lesson 5 Add Three Numbers will give you a clear idea of the concepts.

## McGraw-Hill My Math Grade 2 Answer Key Chapter 1 Lesson 5 Add Three Numbers

Explore and Explain

Teacher Directions: Have students use counters to show the following: There are 4 fish, 6 frogs, and 2 snakes in the pond. Trace the counters and write how many in all.
Explanation:

See and Show

You can group addends in different ways. The sum will stay the same.

Helpful Hint
Look for facts you know.

Find each sum. Circle the numbers you add first. Write that sum in the box.

Question 1.
2 + 4 + 2 = _____

Answer:

Explanation:
If we add the addends in different ways also the sum will be the same.
2 + 4 = 6
6 + 2 = 8

Question 2.
9 + 1 + 2 = _____

Answer:

Explanation:
If we add the addends in different ways also the sum will be the same.
9 + 1 = 10
10 + 2 = 12

Question 3.
7 + 4 + 7 = _____

Answer:

Explanation:
If we add the addends in different ways also the sum will be the same.
7 + 7 = 14
14 + 4 = 18

Question 4.
2 + 7 + 8 = _____

Answer:

Explanation:
If we add the addends in different ways also the sum will be the same.
7 + 2 = 9
9 + 8 = 17

Question 5.
3 + 7 + 4 = _____

Answer:

Explanation:
If we add the addends in different ways also the sum will be the same.
7 + 3 = 10
10 + 4 = 14

Question 6.
5 + 3 + 5 = _____

Answer:

Explanation:
If we add the addends in different ways also the sum will be the same.
5 + 5 = 10
10 + 3 = 13

Talk Math How do you decide which two numbers to add first when adding three digits?
First we try to make 10
or add the doubles.

Helpful Hint
Add two numbers first. Look for facts you know.

On My Own

Find each sum. Circle the numbers you add first. Write that sum in the box.

Question 7.
4 + 3 + 4 = _____

Answer:

Explanation:
If we add the addends in different ways also the sum will be the same.
4 + 4 = 8
8 + 3 = 11

Question 8.
4 + 3 + 7 = _____

Answer:

Explanation:
If we add the addends in different ways also the sum will be the same.
7 + 3 = 10
10 + 4 = 14

Question 9.
2 + 8 + 3 = _____

Answer:

Explanation:
If we add the addends in different ways also the sum will be the same.
8 + 2 = 10
10 + 3 = 13

Question 10.
6 + 1 + 6 = ____
Answer:

Explanation:
If we add the addends in different ways also the sum will be the same.
6 + 6 = 12
12 + 1 = 13

Find each sum.

Question 11.
5 + 5 + 5 = ____
Answer:

Explanation:
If we add the addends in different ways also the sum will be the same.
5 + 5 = 10
10 + 5 = 15

Question 12.
6 + 6 + 3 = ____
Answer:

Explanation:
If we add the addends in different ways also the sum will be the same.
6 + 6 = 12
12 + 3 = 15

Question 13.
7 + 4 + 7 = ___
Answer:

Explanation:
If we add the addends in different ways also the sum will be the same.
7 + 7 = 14
14 + 4 = 18

Question 14.
9 + 8 + 1 = ____
Answer:

Explanation:
If we add the addends in different ways also the sum will be the same.
9 + 1 = 10
10 + 8 = 18

Question 15.
1 + 7 + 3 = ____
Answer:

Explanation:
If we add the addends in different ways also the sum will be the same.
7 + 3 = 10
10 + 1 = 11

Question 16.
5 + 7 + 5 = ____
Answer:

Explanation:
If we add the addends in different ways also the sum will be the same.
5 + 5 = 10
10 + 7 = 7

Question 17.

Answer:

Explanation:
If we add the addends in different ways also the sum will be the same.
7 + 3 = 10
10 + 5 = 15

Question 18.

Answer:

Explanation:
If we add the addends in different ways also the sum will be the same.
7 + 7 = 14
14+ 1 = 15

Question 19.

Answer:

Explanation:
If we add the addends in different ways also the sum will be the same.
9 + 1 = 10
10 + 8 = 18

Problem Solving

Question 20.
The zoo has 5 black bears, 5 brown bears and 2 polar bears. How many bears are at the zoo?

____ bears
Answer:
12 bears
Explanation:
The zoo has 5 black bears,
5 brown bears and 2 polar bears.
5 + 5 = 10
10 + 2 = 12
12 bears are at the zoo.

Question 21.
Lisa saw 4 sheep and 4 goats at the petting zoo. She also saw 3 piglets. How many animals did Lisa see at the petting zoo?
____ animals
Write the doubles fact that helped you solve the problem.
____ + ____ = _____
Answer:
4 + 4 = 8
Explanation:
Lisa saw 4 sheep and 4 goats at the petting zoo.
4 + 4 = 8
She also saw 3 piglets.
8 + 3 = 11
11 animals that Lisa see at the petting zoo.

Write Math Explain how you can group addends in any way to help you solve addition problems that have more than 2 addends.

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