All the solutions provided in McGraw Hill Math Grade 2 Answer Key PDF Chapter 4 Lesson 1 Two-Digit Fact Families will give you a clear idea of the concepts.
McGraw-Hill My Math Grade 2 Answer Key Chapter 4 Lesson 1 Two-Digit Fact Families
Explore and Explain
Teacher Directions: Use base-ten blocks to solve. Lindsay has 16 snowballs. She throws 7 of them. How many are left? Write the three numbers in the fact family. Then write the related number sentences.
Explanation:
See and Show
The numbers in this addition and subtraction fact family are 18, 15, and 3.
15 + 3 = 18 18 – 15 = 3
3 + 15 = 18 18 – 3 = 15
Complete each fact family.
Question 1.
12 + 12 = ____ 24 – 12 = ____
Answer:
12 + 12 = 24
24 – 12 = 12
Explanation:
The numbers in this addition and subtraction fact family are 12, 12 and 24
The number sentences related to the numbers are
12 + 12 = 24
24 – 12 = 12
Question 2.
11 + 6 = ____ 17 – 11 = ____
6 + 11 = ____ 17 – 6 = ____
Answer:
11 + 6 = 17
17 – 11 = 6
6 + 11 = 17
17 – 6 = 11
Explanation:
The numbers in this addition and subtraction fact family are 11, 6 and 17
The number sentences related to the numbers are
11 + 6 = 17
17 – 11 = 6
6 + 11 = 17
17 – 6 = 11
Question 3.
16 + 4 = ____ 20 – 4 = ____
____ + ____ = ____ ___ – ____ = ____
Answer:
16 + 4 = 20 20 – 4 = 16
4 + 16 = 20 20 – 16 = 4
Explanation:
The numbers in this addition and subtraction fact family are 16, 4 and 20
The number sentences related to the numbers are
16 + 4 = 20 20 – 4 = 16
4 + 16 = 20 20 – 16 = 4
Talk Math How are these exercises like fact families that you have learned earlier?
On My Own
Complete each fact family.
Question 4.
____ + ____ = ____ ____ – ____ = ____
____ + ____ = ____ ____ – ____ = ____
Answer:
11 + 8 = 19 19 – 8 = 11
8 + 11 = 19 19 – 11 = 8
Explanation:
The numbers in this addition and subtraction fact family are 8, 11 and 19
The number sentences related to the numbers are
11 + 8 = 19 19 – 8 = 11
8 + 11 = 19 19 – 11 = 8
Question 5.
____ + ____ = ____ ____ – ____ = ____
____ + ____ = ____ ____ – ____ = ____
Answer:
3 + 23 = 26 26 – 3 = 23
23 + 3 = 26 26 – 23 = 3
Explanation:
The numbers in this addition and subtraction fact family are 3, 23 and 26
The number sentences related to the numbers are
3 + 23 = 26 26 – 3 = 23
23 + 3 = 26 26 – 23 = 3
Question 6.
____ + ____ = ____ ____ – ____ = ____
____ + ____ = ____ ____ – ____ = ____
Answer:
22 + 3 = 25 25 – 3 = 22
3 + 22 = 25 25 – 22 = 3
Explanation:
The numbers in this addition and subtraction fact family are 22 , 3 and 25
The number sentences related to the numbers are
22 + 3 = 25 25 – 3 = 22
3 + 22 = 25 25 – 22 = 3
Question 7.
____ + ____ = ____ ____ – ____ = ____
____ + ____ = ____ ____ – ____ = ____
Answer:
14 + 7 = 21 21 – 7 = 14
7 + 14 = 21 21 – 14 = 7
Explanation:
The numbers in this addition and subtraction fact family are 7, 14 and 21
The number sentences related to the numbers are
14 + 7 = 21 21 – 7 = 14
7 + 14 = 21 21 – 14 = 7
Question 8.
____ + ____ = ____ ____ – ____ = ____
____ + ____ = ____ ____ – ____ = ____
Answer:
5 + 32 = 37 37 – 32 = 5
32 + 5 = 37 37 – 5 = 32
Explanation:
The numbers in this addition and subtraction fact family are 5, 32 and 37
The number sentences related to the numbers are
5 + 32 = 37 37 – 32 = 5
32 + 5 = 37 37 – 5 = 32
Problem Solving
Question 9.
Lizzie has 12 necklaces without beads. She also has 22 necklaces that have beads on them. How many necklaces does Lizzie have? Write the fact family that can be made from these numbers.
_____ necklaces
____ + ____ = ____ ____ – ____ = ____
____ + ____ = ____ ____ – ____ = ____
Answer:
12 + 22 = 34 34 – 22 = 12
22 + 12 = 34 34 – 12 = 22
Explanation:
Lizzie has 12 necklaces without beads.
She also has 22 necklaces that have beads on them.
12 + 22 = 34
34 necklaces that Lizzie have.
Question 10.
How many parking spaces are open in the parking lot?
_____ parking spaces
Answer:
12 parking spaces
Explanation:
There are 26 parking spaces
14 are filled
26 – 14 = 12
12 are open
HOT Poblem Sophia wrote this fact family. Tell why Sophia is wrong. Make it right.
76 + 12 = 88 76 – 12 = 88
12 + 76 = 88 12 – 76 = 88
Answer:
88 – 76 = 12
88 – 12 = 76 are subtraction facts.
McGraw Hill My Math Grade 2 Chapter 4 Lesson 1 My Homework Answer Key
Practice
Complete each fact family.
Question 1.
____ + ____ = ____ ____ – ____ = ____
____ + ____ = ____ ____ – ____ = ____
Answer:
9 + 13 = 22 22 – 13 = 9
13 + 9 = 22 22 – 9 = 13
Explanation:
The numbers in this addition and subtraction fact family are 22, 9 and 13
The number sentences related to the numbers are
9 + 13 = 22 22 – 13 = 9
13 + 9 = 22 22 – 9 = 13
Question 2.
____ + ____ = ____ ____ – ____ = ____
____ + ____ = ____ ____ – ____ = ____
Answer:
8 + 13 = 21 21 – 13 = 8
13 + 8 = 21 21 – 8 = 13
Explanation:
The numbers in this addition and subtraction fact family are 21, 13 and 8
The number sentences related to the numbers are
8 + 13 = 21 21 – 13 = 8
13 + 8 = 21 21 – 8 = 13
Question 3.
____ + ____ = ____ ____ – ____ = ____
____ + ____ = ____ ____ – ____ = ____
Answer:
18 + 6 = 24 24 – 18 = 6
6 + 18 = 24 24 – 6 = 18
Explanation:
The numbers in this addition and subtraction fact family are 24, 18 and 6
The number sentences related to the numbers are
18 + 6 = 24 24 – 18 = 6
6 + 18 = 24 24 – 6 = 18
Complete the fact family.
Question 4.
____ + ____ = ____ ____ – ____ = ____
____ + ____ = ____ ____ – ____ = ____
Answer:
13 + 13 = 26
26 – 13 = 13
Explanation:
The numbers in this addition and subtraction fact family are13, 13 and 26
The number sentences related to the numbers are
13 + 13 = 26
26 – 13 = 13
Use what you know about fact families to solve.
Question 5.
Marcus counts 24 children playing. 11 of the children are boys. How many girls are playing?
_______ girls
Answer:
13 girls
Explanation:
Marcus counts 24 children playing.
11 of the children are boys.
24 – 11 = 13
13 girls are playing.
Question 6.
There are 49 second graders. 26 of them are in Miss Johnson’s class. How many students are in Mrs. Stewart’s class?
_____ students
Answer:
23 students
Explanation:
There are 49 second graders.
26 of them are in Miss Johnson’s class.
49 – 26 = 23
23 students are in Mrs. Stewart’s class
Test Practice
Question 7.
Which number sentence does not belong in the fact family for the numbers 7, 18, and 25?
(A) 18 + 7 = 25
(B) 18 – 25 = 7
(C) 7 + 18 = 25
(D) 25 – 7 = 18
Answer:
B
Explanation:
We cannot divide 18 from 25
Math at Home Have your child write the fact family for the numbers 22, 13, and 35.
Answer:
22 + 13 = 35 35 – 13 = 22
13 + 22 = 35 35 – 22 = 13