All the solutions provided in McGraw Hill Math Grade 2 Answer Key PDF Chapter 1 Lesson 11 Missing Addends will give you a clear idea of the concepts.
McGraw-Hill My Math Grade 2 Answer Key Chapter 1 Lesson 11 Missing Addends
Explore and Explain
Teacher Directions: How many dots do you see? How many dots should there be in all? Draw more dots on the blank side of each domino until you have that number of dots in all. Complete the number sentence.
Explanation:
See and Show
You can use a related fact to help you find a missing addend.
Helpful Hint
9 is one of the addends. The other addend is missing.
Find the missing addend. Draw that many dots on the domino.
Question 1.
Answer:
Explanation:
To find the sum we have to find the difference.
The sum of 8 and 6 is 14
8 + 6 = 14
Question 2.
Answer:
Explanation:
To find the sum we have to find the difference.
The sum of 5 and 6 is 11.
Question 3.
Answer:
Explanation:
To find the sum we have to find the difference.
The sum of 4 and 4 is 8
Question 4.
Answer:
Explanation:
To find the sum we have to find the difference.
The sum of 7 and 8 is 15
Think Math How do you find the missing addend in 5 + 
= 13?
Explanation:
13 – 5 = 8
so, 5 + 8 = 13
To find the sum we have to find the difference.
Helpful Hint
To find the missing addend, use related facts.
On My Own
Find the missing addend.
Question 5.
9 + ___ = 12
12 – 9 = ____
Answer:
9 + 3 = 12
12 – 9 = 3
Explanation:
To find the sum we have to find the difference.
The sum of 9 and 3 is 12
Question 6.
7 + ___ = 8
8 – 7 = ___
Answer:
7 + 1= 8
8 – 7 = 1
Explanation:
To find the sum we have to find the difference.
The sum of 7 and 1 is 8
Question 7.
___ + 6 = 12
12 – 6 = ___
Answer:
3 + 6 = 12
12 – 6 = 3
Explanation:
To find the sum we have to find the difference.
The sum of 3 and 6 is 12
Question 8.
____ + 2 = 7
7 – 2 = ____
Answer:
5 + 2 = 7
7 – 2 = 5
Explanation:
To find the sum we have to find the difference.
The sum of 5 and 2 is 7
Question 9.
7 + ___ = 16
16 – 7 = ____
Answer:
7 + 9 = 16
16 – 7 = 9
Explanation:
To find the sum we have to find the difference.
The sum of 7 and 9 is 16
Question 10.
____ + 7 = 14
14 – 7 = ___
Answer:
7 + 7 = 14
14 – 7 = 7
Explanation:
To find the sum we have to find the difference.
The sum of 7 and 7 is 14
Question 11.
9 + ___ = 9
9 – 9 = ___
Answer:
9 + 0 = 9
9 – 9 = 0
Explanation:
To find the sum we have to find the difference.
The sum of 9 and 0 is 9
Question 12.
6 + ___ = 13
13 – 6 = ___
Answer:
6 + 7 = 13
13 – 6 = 7
Explanation:
To find the sum we have to find the difference.
The sum of 6 and 7 is 13
Question 13.
4 + ___ = 12
12 – 4 = ___
Answer:
4 + 8 = 12
12 – 4 = 8
Explanation:
To find the sum we have to find the difference.
The sum of 4 and 8 is 12
Question 14.
5 + ___ = 12
12 – 5 = ____
Answer:
5 + 7 = 12
12 – 5 = 7
Explanation:
To find the sum we have to find the difference.
The sum of 5 and 7 is 12
Problem Solving
Question 15.
There were 14 seals on a rock. Some seals jumped into the water. 9 seals were left on the rock. How many seals jumped into the water?
____ seals
Answer:
5 seals
Explanation:
There were 14 seals on a rock.
Some seals jumped into the water.
9 seals were left on the rock.
14 – 9 = 5
5 seals jumped into the water.
Question 16.
Anna buys 7 plants. She wants 12 plants. How many more plants does Anna need?
____ plants
Answer:
5 plants
Explanation:
Anna buys 7 plants.
She wants 12 plants.
12 – 7 = 5
5 more plants that Anna need.
Question 17.
J.J. wants 16 fish in his aquarium. He has 6 fish now. How many more fish does J.J. need?
____ fish
Answer:
10 fish
Explanation:
J.J. wants 16 fish in his aquarium.
He has 6 fish now.
16 – 6 = 10
10 more fish that J.J. need.
HOT Problems Julie found a missing addend like this:
7 + 
= 9 9 + 7 = 16
Tell what she did wrong. Make it right.
_________________
_________________
_________________
_________________
Explanation:
7 + 2 = 9
9 – 7 = 2
The missing number is 2
Instead of difference they found the sum.
McGraw Hill My Math Grade 2 Chapter 1 Lesson 11 My Homework Answer Key
Practice
Find the missing addend.
Question 1.
8 + ___ = 12
12 – 8 = ____
Answer:
8 + 4 = 12
12 – 8 = 4
Explanation:
To find the sum we have to find the difference.
The sum of 8 and 4 is 12
Question 2.
___ + 6 = 15
15 – 6 = ____
Answer:
9 + 6 = 15
15 – 6 = 9
Explanation:
To find the sum we have to find the difference.
The sum of 9 and 6 is 15
Question 3.
8 + ___ = 13
13 – 8 = ___
Answer:
8 + 5 = 13
13 – 8 = 5
Explanation:
To find the sum we have to find the difference.
The sum of 8 and 5 is 13
Question 4.
____ + 7 = 11
11 – 7 = ___
Answer:
4 + 7 = 11
11 – 7 = 4
Explanation:
To find the sum we have to find the difference.
The sum of 4 and 7 is 11
Question 5.
8 + ___ = 17
17 – 8 = ___
Answer:
8 + 9 = 17
17 – 8 = 9
Explanation:
To find the sum we have to find the difference.
The sum of 8 and 7 is 9
Question 6.
9 + ___ = 12
12 – 9 = ___
Answer:
9 + 3 = 12
12 – 9 = 3
Explanation:
To find the sum we have to find the difference.
The sum of 9 and 3 is 12
Question 7.
David and his friends are flying 9 kites. Some kites get stuck in a tree. 7 kites are still flying. How many kites are in the tree?
7 + ____ = 9
____ kites
Answer:
2 kites
Explanation:
David and his friends are flying 9 kites.
Some kites get stuck in a tree.
7 kites are still flying.
9 – 7 = 2
2 kites are in the tree.
Question 8.
The Girl Scouts put some boats in the pond. They leave 9 boats on land. There are 15 r boats altogether. How many boats did the scouts put into the pond?
9 + ___ = 15
___ boats
Answer:
6 boats.
Explanation:
They leave 9 boats on land.
There are 15 r boats altogether.
15 – 9 = 6
6 boats that the scouts put into the pond.
Question 7.
7 boys were riding their bikes. Some of the boys went home. 3 boys are still riding their bikes. How many boys went home?
3 + ___ = 7
____ boys
Answer:
4 boys
Explanation:
7 boys were riding their bikes.
Some of the boys went home.
3 boys are still riding their bikes.
7 – 3 = 4
4 boys went home.
Vocabulary Check
Complete the sentence.
missing addend sum
Question 10.
When a number sentence only has one addend, you must find the ____ to solve it.
Answer:
missing addend
Explanation:
When a number sentence only has one addend, you must find the missing addend to solve it.
Math at Home Ask your child to tell you the subtraction fact that will help him or her find the missing addend in 7 + ___ = 15.