All the solutions provided in McGraw Hill My Math Grade 1 Answer Key PDF Chapter 3 Lesson 5 Use Near Doubles to Add will give you a clear idea of the concepts.
McGraw-Hill My Math Grade 1 Answer Key Chapter 3 Lesson 5 Use Near Doubles to Add
Explore and Explain
Answer:
Explanation:
I used 
to model the problem
I shown the doubles fact 3 + 3
Then i took away 1 cube
3 + 2 = 5
So, the addition number sentence is 3 + 2 = 5.
Teacher Directions: Use to model. Show the doubles fact 3 + 3 on the billboard. Add or take away one cube from one of the groups of cubes. Trace the cubes. Write the addition number sentence.
See and Show
You can use near doubles facts to find a sum. If you know 5 + 5 = 10, you can find 5 + 6 and 5 + 4.
Use 
to model. Write the addition number sentence.
Question 1.
Answer:
Explanation:
The doubles fact is 4 + 4 = 8
The doubles plus 1 is 4 + 5 = 9.
Question 2.
Answer:
Explanation:
The doubles fact is 3 + 3 = 6
The doubles minus 1 is 3 + 2 = 5.
Talk Math How do doubles facts help you learn near doubles facts?
Answer:
The doubles facts helps us to learn the near doubles either by adding or subtracting 1 from the doubles.
On My Own
Use 
to model. Find each sum.
Question 3.
2 + 2 = ____
2 + 3 = ____
Answer:
Explanation:
The doubles fact is 2 + 2 = 4
The doubles plus 1 is 2 + 3 = 5.
Question 4.
3 + 3 = ____
3 + 2 = ____
Answer:
Explanation:
The doubles fact is 3 + 3 = 6
The doubles minus 1 is 3 + 2 = 5.
Question 5.
8 + 7 = ____
Answer:
Explanation:
The doubles fact is 7 + 7 = 14
I drew doubles plus 1
The addition number sentence is 8 + 7 = 15.
Question 6.
7 + 7 = ____
Answer:
Explanation:
The doubles fact is 7 + 7 = 14.
Question 7.
6 + 6 = ____
Answer:
Explanation:
The doubles fact is 6 + 6 = 12.
Question 8.
6 + 5 = ____
Answer:
Explanation:
The doubles fact is 5 + 5 = 10
Doubles plus 1 is 6 + 5 = 11.
Question 9.
Answer:
Explanation:
7 + 7 = 14
7 + 6 = 13
So, the sum of 7 and 6 is 13.
Question 10.
Answer:
Explanation:
7 + 7 = 14
7 + 8 = 15
So, the sum of 7 and 8 is 15.
Question 11.
Answer:
Explanation:
4 + 4 = 8
4 + 3 = 7
So, the sum of 4 and 3 is 7.
Question 12.
Answer:
Explanation:
5 + 5 = 10
5 + 4 = 9
So, the sum of 5 and 4 is 9.
Question 13.
Answer:
Explanation:
5 + 5 = 10
So, the sum of 5 and 5 is 10.
Question 14.
Answer:
Explanation:
5 + 5 = 10
5 + 6 = 11
So, the sum of 5 and 6 is 11.
Question 15.
Answer:
Explanation:
The sum of 7 and 3 is 10.
Question 16.
Answer:
Explanation:
The sum of 7 and 5 is 12.
Question 17.
Answer:
Explanation:
The sum of 7 and 4 is 11.
Problem Solving
Solve. Write the doubles foot that helped you solve the problem.
Question 18.
Tyra sees 5 beetles. Sara sees 6 beetles. How many beetles do they see in all?
____ beetles
____ + ___ = ____
Answer:
Explanation:
Tyra sees 5 beetles
Sara sees 6 beetles
The doubles fact is 5 + 5 = 10
Doubles fact plus 1 is 5 + 6 = 11
So, they saw 11 beetles in all.
Question 19.
Adam has 9 red flowers and 8 purple flowers. How many flowers does he have in all?
_____ flowers
____ + ___ = ____
Answer:
Explanation:
Adam has 9 red flowers
8 purple flowers
Doubles fact is 9 + 9 = 18
Doubles fact minus 1 is 9 + 8 = 17
So, Adam ha s17 flowers in all.
HOT Problem Devon has 6 pets. Maya has 7 pets. The answer is 13 pets. What is the question?
________________________
________________________
________________________
Answer:
Devon has 6 pets. Maya has 7 pets. How many pets do they have in all?
McGraw Hill My Math Grade 1 Chapter 3 Lesson 5 My Homework Answer Key
Practice
Find each sum.
Question 1.
4 + 4 = _____
4 + 5 = ____
Answer:
Explanation:
The doubles fact is 4 + 4 = 8
The doubles plus 1 is 4 + 5 = 9.
Question 2.
8 + 8 = ____
8 + 7 = ____
Answer:
Explanation:
The doubles fact is 8 + 8 = 7
The doubles minus 1 is 8 + 7 = 15.
Question 3.
6 + 5 = ____
Answer:
Explanation:
The doubles fact is 5 + 5 = 10
The doubles plus 1 is 6 + 5 = 11.
Question 4.
6 + 6 = ____
Answer:
Explanation:
The doubles fact is 6 + 6 = 12.
Question 5.
Answer:
Explanation:
7 + 7 = 14
7 + 6 = 15
So, the sum of 7 and 6 is 13.
Question 6.
Answer:
Explanation:
The doubles fact is 7 + 7 = 14.
Question 7.
Answer:
Explanation:
7 + 7 = 14
7 + 8 = 15
So, the sum of 7 and 8 is 15.
Solve. Write the doubles fact that helped you solve the problem.
Question 8.
Paul is a dog walker. He walks 7 small dogs. He walks 6 large dogs. How many dogs does he walk in all?
____ dogs
____ + ____ = ____
Answer:
Explanation:
Paul is a dog walker
He walks 7 small dogs
He walks 6 large dogs
Doubles fact is 7 + 7 = 14
Doubles minus 1 is 7 + 6 = 13
So, Paul walks 13 dogs in all.
Question 9.
There are 9 girls and 8 boys in Maria’s class who walk to school. How many children in her class walk to school in all?
____ children
____ + ____ = ____
Answer:
Explanation:
There are 9 girls and 8 boys in Maria’s class who walk to school
The doubles fact is 8 + 8= 16
The doubles plus 1 is 9 + 8 = 17
So, 17 children walk to school.
Vocabulary Check
Circle the missing word.
doubles plus 1 doubles minus 1
Question 10.
If you know that 8 + 8 = 16, then you can use ____ to find 8 + 7.
Answer:
If you know that 8 + 8 = 16, then you can use doubles minus 1 to find 8 + 7.
Math at Home Give your child an addition problem such as 4 + 5 or 3 + 4. Have your child give you the doubles fact that will help him or her find the sum.