# McGraw Hill My Math Grade 1 Chapter 3 Lesson 1 Answer Key Count On 1, 2, or 3

All the solutions provided inÂ McGraw Hill My Math Grade 1 Answer Key PDF Chapter 3 Lesson 1 Count On 1, 2, or 3 will give you a clear idea of the concepts.

## McGraw-Hill My Math Grade 1 Answer Key Chapter 3 Lesson 1 Count On 1, 2, or 3

Explore and Explain

Explanation:
I drew a group of 4 crayons
Then, I drew 2 more crayons
The addition number sentence that tells how many in all is 4 + 2 = 6.

Teacher Directions: Draw a group of four crayons. Then draw 1, 2, or 3 more crayons. Write an addition number sentence that tells how many in all.

See and Show
You can count on to add. There are 5 crayons in the group. Add 2 more crayons.

Start with the greater number, 5. Count on 2 more. 5, 6, 7
5 + 2 = 7

Question 1.

Explanation:
Started with the greater number, 7
I Counted on 3 more. 8, 9, 10
So, 7 + 3 = 10.

Question 2.

Explanation:
Started with the greater number, 6
I Counted on 2 more. 7, 8
So, 7 + 2 = 8.

Talk Math Tell how to count on to add 5 + 3.
Start at 5
Count by 1’s
Count on 3 more
5 after 6, 7, 8
So, 5 + 3 = 8.

On My Own

Question 3.
5 + 3 = _____
8

Explanation:
Started with the greater number, 8
I Counted on 3 more. 6, 7, 8
So, 5 + 3 = 8.

Question 4.
8 + 3 = _____
11

Explanation:
Started with the greater number, 8
I Counted on 3 more. 9, 10, 11
So, 8 + 3 = 11.

Question 5.
4 + 1 = ____
5

Explanation:
Started with the greater number, 4
I Counted on 1 more. 5
So, 4 + 1 = 5.

Question 6.
1 + 2 = _____
3

Explanation:
Started with the greater number, 2
I Counted on 1 more. 3
So, 1 + 2 = 3.

Question 7.
9 + 3 = ____
12

Explanation:
Started with the greater number, 9
I Counted on 3 more. 10, 11, 12
So, 9 + 3 = 12.

Question 8.
1 + 8 = ____
9

Explanation:
Started with the greater number, 8
I Counted on 1 more. 9
So, 1 + 8 = 9.

Question 9.
3 + 7 = ____
10

Explanation:
Started with the greater number, 7
I Counted on 3 more. 8, 9, 10
So, 3 + 7 = 10.

Question 10.
2 + 9 = ____
11

Explanation:
Started with the greater number, 9
I Counted on 2 more. 10, 11
So, 2 + 9 = 11.

Question 11.
1 + 7 = ____
8

Explanation:
Started with the greater number, 7
I Counted on 1 more.Â  8
So, 1 + 7 = 8.

Question 12.
4 + 3 = ____
7

Explanation:
Started with the greater number, 4
I Counted on 3 more. 5, 6, 7
So, 4 + 3 = 7.

Question 13.
2 + 7 = ___
9

Explanation:
Started with the greater number, 7
I Counted on 2 more. 8, 9
So, 2 + 7 = 9.

Question 14.
5 + 1 = ___
6

Explanation:
Started with the greater number, 5
I Counted on 1 more. 6
So, 5 + 1 = 6.

Question 15.

Explanation:
Started with the greater number, 8
I Counted on 2 more. 9, 10
So, 8 + 2 = 10.

Question 16.

Explanation:
Started with the greater number, 6
I Counted on 1 more. 7
So, 1 + 6 = 7.

Question 17.

Explanation:
Started with the greater number, 9
I Counted on 1 more. 10
So, 9 + 1 = 10.

Question 18.

Explanation:
Started with the greater number, 6
I Counted on 3 more. 7, 8, 9
So, 3 + 6 = 9.

Question 19.

Explanation:
Started with the greater number, 5
I Counted on 2 more. 6, 7
So, 2 + 5 = 7.

Question 20.

Explanation:
Started with the greater number, 3
I Counted on 2 more. 4, 5
So, 3 + 2 = 5.

Problem Solving

Question 21.
Bella sees 2 buses. Then she sees 3 more buses. How many buses does she see in all?

____ buses
5 buses

Explanation:
Bella sees 2 buses
Then she sees 3 more buses
Started with the greater number, 3
I Counted on 2 more. 4, 5
2 + 3 = 5
So, Bella sees 5 buses in all.

Question 22.
Jake saw 5 cars in the morning. He saw 3 more cars in the evening. How many cars did Jake see in all?

____ cars
8 cars

Explanation:
Jake saw 5 cars in the morning
He saw 3 more cars in the evening
Started with the greater number, 5
I Counted on 3 more. 6, 7, 8
5 + 3 = 8
So, Jake sees 8 cars in all.

Write Math Explain how you count on to find 3 + 7.
____________________
____________________
____________________
3 + 7 = 10

Explanation:
Started with the greater number, 7
I Counted on 7 more. 8, 9, 10
So, 3 + 7 = 10.

### McGraw Hill My Math Grade 1 Chapter 3 Lesson 1 My Homework Answer Key

Practice

Question 1.
7 + 2 = ___
9

Explanation:
Started with the greater number, 7
I Counted on 2 more. 8, 9
So, 7 + 2 = 9.

Question 2.
4 + 3 = ____
7

Explanation:
Started with the greater number, 4
I Counted on 3 more. 5, 6, 7
So, 4 + 3 = 7.

Question 3.
5 + 3 = ___
8

Explanation:
Started with the greater number, 5
I Counted on 3 more. 6, 7, 8
So, 5 + 3 = 8.

Question 4.
6 + 1 = ___
7

Explanation:
Started with the greater number, 6
I Counted on 1 more. 7
So, 6 + 1 = 7.

Question 5.
9 + 1 = ____
10

Explanation:
Started with the greater number, 9
I Counted on 1 more. 10
So, 9 + 1 = 10.

Question 6.
2 + 5 = ____
7

Explanation:
Started with the greater number, 5
I Counted on 2 more. 6, 7
So, 2 + 5 = 7.

Question 7.
8 + 3 = ___
11

Explanation:
Started with the greater number, 8
I Counted on 3 more. 9, 10, 11
So, 8 + 3 = 11.

Question 8.
7 + 1 = ___
8

Explanation:
Started with the greater number, 7
I Counted on 1 more. 8
So, 7 + 1 = 8.

Question 9.

Explanation:
Started with the greater number, 6
I Counted on 3 more. 7, 8, 9
So, 3 + 6 = 9.

Question 10.

Explanation:
Started with the greater number, 8
I Counted on 2 more. 9, 10
So, 8 + 2 = 10.

Question 11.

Explanation:
Started with the greater number, 8
I Counted on 1 more. 9
So, 1 + 8 = 9.

Question 12.

Explanation:
Started with the greater number, 9
I Counted on 3 more. 10, 11, 12
So, 3 + 9 = 12.

Question 13.

Explanation:
Started with the greater number, 6
I Counted on 2 more. 7, 8
So, 6 + 2 = 8.

Question 4.

Explanation:
Started with the greater number, 9
I Counted on 2 more. 10, 11
So, 9 + 2 = 11.

Question 15.
Drew went to basketball practice 3 times this week. He went to soccer practice 2 times this week. How many practices did he go to in all?

____ practices
5 practices

Explanation:
Drew went to basketball practice 3 times this week
He went to soccer practice 2 times this week
Started with the greater number, 3
I Counted on 2 more. 4, 5
3 + 2 = 5
So, Drew went to 5 practices in all.

Vocabulary Check

Circle the missing word.

count on sum

Question 16.
You can ________ to add when you join any number with 1, 2, or 3.
count on

Explanation:
You can count on to add when you join any number with 1, 2, or 3.

Math at Home Say a number between 1 and 9. Ask your child to add 1, 2, and 3 to that number.
Let the number be 5
5 + 1 =
Started with the greater number, 5
I Counted on 1 more. 6
5 + 1 = 6
5 + 2 =
Started with the greater number, 5
I Counted on 2 more. 6, 7
5 + 2 = 7
5 + 3 =
Started with the greater number, 5
I Counted on 3 more. 6, 7, 8
5 + 3 = 8.

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