All the solutions provided in McGraw Hill My Math Grade 1 Answer Key PDF Chapter 4 Lesson 8 Missing Addends will give you a clear idea of the concepts.
McGraw-Hill My Math Grade 1 Answer Key Chapter 4 Lesson 8 Missing Addends
Explore and Explain
Answer:
Explanation:
The butterfly has 7 spots on the left wing and some more spots on its right wing
It has 11 spots in all
11 – 7 = 4
So, there are 4 spots on the right wing.
Teacher Directions: Use 
to model. The butterfly has 7 spots on the left wing and some more spots on its right wing. It has 11 spots in all. How many spots are on the right wing? Trace your counters to show the spots. Trace the missing part.
See and Show
Helpful Hint
To find the missing part, subtract the known part from the whole.
Use related facts to help you find a missing addend
So, 5 is the missing addend.
Use Work Mat 3 and 
Find the missing addend.
Question 1.
5 + 
= 13
Think:
13 – 5 =
Answer:
5 + 
= 12
12 – 5 =
Explanation:
I wrote the missing addend by subtracting
13 – 5 = 8
The missing addend is 8
So, 13 – 5 = 8.
Question 2.
+ 5 = 8
Think:
8 – 5 =
Answer:
+ 5 = 8
8 – 5 =
Explanation:
I wrote the missing addend by subtracting
8 – 5 = 3
The missing addend is 3
So, 3 + 5 = 8.
Talk Math
Explain how to find the missing addend in + 5 = 14.
You can find missing addends by subtracting.
Answer:
Explanation:
I wrote the missing addend by subtracting
14 – 5 = 9
The missing addend is 9
So, 9 + 5 = 14.
On My Own
Use Work Mat 3 and 
Find the missing addend.
Question 3.
4 + = 10
10 – 4 =
Answer:
4 +
= 10
10 – 4 =
Explanation:
I wrote the missing addend by subtracting
10 – 4 = 6
The missing addend is 6
So, 4 + 6 = 10.
Question 4.
+ 6 = 14
14 – 6 =
Answer:
+ 6 = 14
14 – 6 =
Explanation:
I wrote the missing addend by subtracting
14 – 6 = 8
The missing addend is 8
So, 8 + 6 = 14.
Question 5.
8 + = 9
9 – 8 =
Answer:
8 + 
= 9
9 – 8 =
Explanation:
I wrote the missing addend by subtracting
9 – 8 = 1
The missing addend is 1
So, 8 + 1 = 9.
Question 6.
+ 3 = 11
11 – 3 =
Answer:
+ 3 = 11
11 – 3 =
Explanation:
I wrote the missing addend by subtracting
11 – 3 = 8
The missing addend is 8
So, 8 + 3 = 11.
Question 7.
+ 7 = 13
13 – 7 =
Answer:
+ 7 = 13
13 – 7 =
Explanation:
I wrote the missing addend by subtracting
13 – 7 = 6
The missing addend is 6
So, 6 + 7 = 13.
Question 8.
6 + = 15
15 – 6 =
Answer:
6 + = 15
15 – 6 =
Explanation:
I wrote the missing addend by subtracting
15 – 6 = 9
The missing addend is 9
So, 6 + 9 = 15.
Question 9.
9 + = 17
17 – 9 =
Answer:
9 + = 17
17 – 9 =
Explanation:
I wrote the missing addend by subtracting
17 – 9 = 8
The missing addend is 8
So, 9 + 8 = 17.
Question 10.
9 + = 16
16 – 9 =
Answer:
9 + 
= 16
16 – 9 =
Explanation:
I wrote the missing addend by subtracting
16 – 9 = 7
The missing addend is 7
So, 9 + 7 = 16.
Problem Solving
Question 11.
Max has 5 shovels and some sand pails at the beach. He has 14 shovels and sand pails in all. How many sand pails does he have?
_______ sand pails
Answer:
sand pails
Explanation:
Max has 5 shovels and some sand pails at the beach
He has 14 shovels and sand pails in all
Subtract to find the number of pails
14 – 5 = 9
The missing addend is 9
So, 9 + 5 = 14
Therefore, Max have 9 sand pails.
Question 12.
When I am added to 7, the sum is 12. What number am I?
______________
Answer:
+ 7 = 12
Explanation:
When I am added to 7, the sum is 12
Subtract to find the answer
12 – 7 = 5
So, number is 5
5 + 7 = 12.
Write Math How do you use subtraction to find a missing addend in an addition problem? Explain.
_________________________
_________________________
_________________________
_________________________
Answer:
In order to obtain the missing addend, all you have to do is simply subtract the given addend from the total to get the missing digit. Missing Number in Addition Example
Example:
Find the Missing Addend 7 + ? = 9 Solution: Since the missing number is after the + sign we use the counting method. Check how many more added to 7 makes the sum 9.
McGraw Hill My Math Grade 1 Chapter 4 Lesson 8 My Homework Answer Key
Practice
Find the missing addend.
Question 1.
8 + = 11
11 – 8 =
Answer:
8 + = 11
11 – 8 =
Explanation:
I wrote the missing addend by subtracting
11 – 8 = 3
The missing addend is 3
So, 8 + 3 = 11.
Question 2.
+ 8 = 16
16 – 8 =
Answer:
+ 8 = 16
16 – 8 =
Explanation:
I wrote the missing addend by subtracting
16 – 8 = 8
The missing addend is 8
So, 8 + 8 = 16.
Find the missing addend.
Question 3.
9 + = 18
Answer:
9 + = 18
Explanation:
I wrote the missing addend by subtracting
18 – 9 = 9
The missing addend is 9
So, 9 + 9 = 18.
Question 4.
+ 6 = 14
14 – 6 =
Answer:
+ 6 = 14
14 – 6 =
Explanation:
I wrote the missing addend by subtracting
14 – 6 = 8
The missing addend is 8
So, 8 + 6 = 14.
Question 5.
+ 8 = 15
15 – 8 =
Answer:
+ 8 = 15
15 – 8 =
Explanation:
I wrote the missing addend by subtracting
15 – 8 = 7
The missing addend is 7
So, 7 + 8 = 15.
Question 6.
5 + = 11
11 – 5 =
Answer:
5 + = 11
11 – 5 =
Explanation:
I wrote the missing addend by subtracting
11 – 5 = 6
The missing addend is 7
So, 5 + 6 = 11.
Question 7.
There are 16 children flying kites on the beach. Some of the children go home. 9 children are still flying kites. How many children went home?
____ children
Answer:
children
Explanation:
There are 16 children flying kites on the beach
Some of the children go home
9 children are still flying kites
16 – 9 =
I wrote the missing addend by subtracting
16 – 9 = 7
The missing addend is 7
9 + 7 = 16
So, 7 children went home.
Vocabulary Check
Question 8.
Circle the number sentence that shows a missing addend.
4 + 8 = 12 7 + = 15
Answer:
Explanation:
7 + 8 = 15 is the sentence that shows a missing addend
So, i drew a circle around the second sentence.
Math at Home Ask your child to tell you the subtraction fact that will help him or her find the missing addend in 8 + = 15.
Answer:
8 + = 15
Explanation:
I wrote the missing addend by subtracting
15 – 8 = 7
The missing addend is 7
So, 8 + 7= 15.