McGraw Hill My Math Grade 1 Chapter 6 Lesson 7 Answer Key Count Back by 10s

All the solutions provided in McGraw Hill My Math Grade 1 Answer Key PDF Chapter 6 Lesson 7 Count Back by 10s will give you a clear idea of the concepts.

McGraw-Hill My Math Grade 1 Answer Key Chapter 6 Lesson 7 Count Back by 10s

Explore and Explain

McGraw Hill My Math Grade 1 Chapter 6 Lesson 7 Answer Key Count Back by 10s 1
70 – 30 = ______________
Teacher Directions: Use McGraw Hill My Math Grade 1 Chapter 6 Lesson 7 Answer Key Count Back by 10s 2 to model. Samuel starts at 70. He hops and lands on 70 – 30. Draw a circle around the number where he lands. Write the number. Explain to a classmate how you found the answer.
Answer:
McGraw Hill My Math Grade 1 Chapter 6 Lesson 7 Answer Key 14

Explanation:
I used McGraw Hill My Math Grade 1 Chapter 6 Lesson 7 Answer Key Count Back by 10s 2 to model the problem
Samuel starts at 70
He hops and lands on 70 – 30
I drew a circle around the number 40
I counted back and jumped
70 – 30 = 40.

See and Show

Use a number line to subtract numbers by tens.
Helpful Hint
Start at 50. Count back by tens to find the difference. 40, 30, 20, 10.
McGraw Hill My Math Grade 1 Chapter 6 Lesson 7 Answer Key Count Back by 10s 3

Use the number line to help you subtract. Write the difference.

Question 1.
80 – 30 = ______________
McGraw Hill My Math Grade 1 Chapter 6 Lesson 7 Answer Key Count Back by 10s 4
Answer:
McGraw Hill My Math Grade 1 Chapter 6 Lesson 7 Answer Key 1

Explanation:
Use a number line to subtract numbers by tens
Start at 80
Count back by tens to find the difference 70, 60, 50
So, 80 – 30 = 50.

Question 2.
50 – 20 = _______________
McGraw Hill My Math Grade 1 Chapter 6 Lesson 7 Answer Key Count Back by 10s 4
Answer:
McGraw Hill My Math Grade 1 Chapter 6 Lesson 7 Answer Key 2

Explanation:
Use a number line to subtract numbers by tens
Start at 50
Count back by tens to find the difference 40, 30
So, 50 – 20 = 30.

Talk Math Explain how you can use a number line to help you subtract by tens.
Answer:
I can use number line and count backward by jumping backwards by 10
In this way i can subtract by 10’s.

McGraw Hill My Math Grade 1 Chapter 6 Lesson 7 My Homework Answer Key

Practice

Use the number line to help you subtract. Write the difference.

Question 1.
60 – 20 = _______________
McGraw Hill My Math Grade 1 Chapter 6 Lesson 7 Answer Key Count Back by 10s 4
Answer:
McGraw Hill My Math Grade 1 Chapter 6 Lesson 7 Answer Key 3

Explanation:
Use a number line to subtract numbers by tens
Start at 60
Count back by tens to find the difference 50, 40
So, 60 – 20 = 40.

Question 2.
90 – 10 = _________________
McGraw Hill My Math Grade 1 Chapter 6 Lesson 7 Answer Key Count Back by 10s 4
Answer:
McGraw Hill My Math Grade 1 Chapter 6 Lesson 7 Answer Key 4

Explanation:
Use a number line to subtract numbers by tens
Start at 90
Count back by tens to find the difference 80
So, 90 – 10 = 80.

Question 3.
80 – 30 = ________________
McGraw Hill My Math Grade 1 Chapter 6 Lesson 7 Answer Key Count Back by 10s 4
Answer:
McGraw Hill My Math Grade 1 Chapter 6 Lesson 7 Answer Key 5

Explanation:
Use a number line to subtract numbers by tens
Start at 80
Count back by tens to find the difference 70, 60, 50
So, 80 – 30 = 50.

Question 4.
50 – 40 = _______________
Answer:
McGraw Hill My Math Grade 1 Chapter 6 Lesson 7 Answer Key 6

Explanation:
Use a number line to subtract numbers by tens
Start at 50
Count back by tens to find the difference 40, 30, 0, 10
So, 50 – 40 = 10.

Question 5.
80 – 10 = _______________
Answer:
McGraw Hill My Math Grade 1 Chapter 6 Lesson 7 Answer Key 7

Explanation:
Use a number line to subtract numbers by tens
Start at 80
Count back by tens to find the difference 70
So, 80 -10 = 70.

Question 6.
30 – 10 = _______________
Answer:
McGraw Hill My Math Grade 1 Chapter 6 Lesson 7 Answer Key 8

Explanation:
Use a number line to subtract numbers by tens
Start at 30
Count back by tens to find the difference 20
So, 30 -10 = 20.

Question 7.
70 – 20 = _______________
Answer:
McGraw Hill My Math Grade 1 Chapter 6 Lesson 7 Answer Key 9

Explanation:
Use a number line to subtract numbers by tens
Start at 70
Count back by tens to find the difference 60, 50
So, 70 -20 = 50.

Question 8.
McGraw Hill My Math Grade 1 Chapter 6 Lesson 7 Answer Key Count Back by 10s 6
Answer:
McGraw Hill My Math Grade 1 Chapter 6 Lesson 7 Answer Key 10

Explanation:
The difference of 90 and 30 is 60
90 – 30 = 60.

Question 9.
McGraw Hill My Math Grade 1 Chapter 6 Lesson 7 Answer Key Count Back by 10s 7
Answer:
McGraw Hill My Math Grade 1 Chapter 6 Lesson 7 Answer Key 11

Explanation:
The difference of 40 and 10 is 30
40 – 10 = 30.

Question 10.
McGraw Hill My Math Grade 1 Chapter 6 Lesson 7 Answer Key Count Back by 10s 8
Answer:
McGraw Hill My Math Grade 1 Chapter 6 Lesson 7 Answer Key 12

Explanation:
The difference of 60 and 40 is 20
60 – 40 = 20.

Question 11.
There are 30 children in line to go down a slide. 10 children go down the slide. How many children are still in line?
_____________ children
Answer:
McGraw Hill My Math Grade 1 Chapter 6 Lesson 7 Answer Key 13

Explanation:
There are 30 children in line to go down a slide
10 children go down the slide
Use a number line to subtract numbers by tens
Start at 30
Count back by tens to find the difference 20
So, 30 – 20 = 10
Therefore, 10 children are still in the line.

Test Practice

Question 12.
70 – 10 = _________________
(A) 60
(B) 70
(C) 80
(D) 90
Answer:
(A) 60

Explanation:
Start at 70
Count back by tens to find the difference 60
So, 70 – 10 = 60.

Math at Home Have your child show 60 – 20 using a number line. Have him or her explain how they use the number line as they subtract.
Answer:
McGraw Hill My Math Grade 1 Chapter 6 Lesson 7 Answer Key 3

Explanation:
Use a number line to subtract numbers by tens
Start at 60
Count back by tens to find the difference 50, 40
So, 60 – 20 = 40.

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