All the solutions provided in **McGraw Hill My Math Grade 1 Answer Key PDF Chapter 6 Lesson 2 Count On Tens and Ones **will give you a clear idea of the concepts.

## McGraw-Hill My Math Grade 1 Answer Key Chapter 6 Lesson 2 Count On Tens and Ones

**Explore and Explain**

Teacher Directions: Use and to model. There are 35 people at a baseball game. 3 more people come to the game. How many people are at the game in all? Draw the rods and units that you used. Explain to a classmate how you found the answer.

Answer:

Explanation:

Start at 35

Count on 36, 37, 38

The sum is 38.

**See and Show**

Find 26 + 3.

Count on by ones.

Find 26 + 30.

Count on by tens.

**Count on to add. Use and . Write the sum.**

Question 1.

47 + 2 = ______________

Answer:

49

Explanation:

Count by 1’s

Start at 47

Count on 48, 49

The sum is 49.

Question 2.

47 + 20 = ______________

Answer:

67

Explanation:

Count by 10’s

Start at 47

Count on 57, 67

The sum is 67.

Question 3.

13 + 3 = _______________

Answer:

16

Explanation:

Count by 1’s

Start at 13

Count on 14, 15, 16

The sum is 16.

Question 4.

13 + 30 = _______________

Answer:

43

Explanation:

Count by 10’s

Start at 13

Count on 23, 33, 43

The sum is 43.

**Talk Math** How many tens do you count on to add 32 + 40? Explain.

Answer:

4 tens

Explanation:

In 40 there are 4 tens

40 = 4 tens

So, i will count on 4 tens to add 40.

**On My Own**

**Count on to add. Use and . Write the sum.**

Question 5.

50 + 14 = _____________

Answer:

64

Explanation:

Count by 10’s

Start at 50

Count on 60

Count by 1’s

Start at 60

Count on 61, 62, 63, 64

The sum is 64.

Question 6.

25 + 3 = _______________

Answer:

28

Explanation:

Count by 1’s

Start at 28

Count on 26, 27, 28

The sum is 28.

Question 7.

30 + 22 = ______________

Answer:

Explanation:

Count by 10’s

Start at 30

Count on 40, 50

Count by 1’s

Start at 60

Count on 51, 52

The sum is 52.

Question 8.

66 + 2 = _______________

Answer:

Explanation:

Count by 1’s

Start at 66

Count on 67, 68

The sum is 68.

Question 9.

53 + 20 = ______________

Answer:

Explanation:

Count by 10’s

Start at 53

Count on 63, 73

The sum is 73.

Question 10.

14 + 3 = _______________

Answer:

Explanation:

Count by 1’s

Start at 14

Count on 15, 16, 17

The sum is 17.

Question 11.

51 + 3 = _______________

Answer:

Explanation:

Count by 1’s

Start at 51

Count on 52, 53, 54

The sum is 54.

Question 12.

20 + 76 = ________________

Answer:

Explanation:

Count by 10’s

Start at 20

Count on 30, 40, 50, 60, 70, 80, 90

Count by 1’s

Start at 90

Count on 91, 92, 93, 94, 95, 96

The sum is 96.

Question 13.

Answer:

Explanation:

The sum of 44 and 3 is 47.

Question 14.

Answer:

Explanation:

The sum of 10 and 88 is 98.

Question 15.

Answer:

Explanation:

The sum of 88 and 1 is 89.

Question 16.

Answer:

Explanation:

The sum of 33 and 3 is 36.

Question 17.

Answer:

Explanation:

The sum of 12 and 2 is 14.

Question 18.

Answer:

Explanation:

The sum of 79 and 20 is 99.

**Problem Solving**

Question 19.

Percy sees 3 ants in his ant farm. He sees 12 more ants. How many ants does he see in all?

_____________ ants

Answer:

15 ants

Explanation:

Percy sees 3 ants in his ant farm

He sees 12 more ants

Count by 1’s

Start with the greater number

Start at 12

Count on, 13, 14, 15

The sum is 15

So, Percy saw 15 ants in all.

Question 20.

Kevin’s team and Alonso’s team each have 25 points. Kevin’s team scores 30 more points.

Kevin’s team has _____________ points.

Alonso’s team scores 30 more points.

Alonso’s team has _____________ points.

Answer:

Kevin’s team has 25 points.

Alonso’s team scores 30 more points.

Alonso’s team has 55 points.

Explanation:

Kevin’s team and Alonso’s team each have 25 points

Kevin’s team scores 30 more points

Count by 10’s

Start at 25

Count on 35, 45, 55

The sum is 55

So, Alonso’s team has 55 points.

**Write Math** Find 54 + 3. Explain how you add the ones.

Answer:

54 + 3 = 57

Explanation:

54 + 3

Count by 1’s

Start at 54

Count on 55, 56, 57

The sum is 57

So, 54 + 3 = 57.

### McGraw Hill My Math Grade 1 Chapter 6 Lesson 2 My Homework Answer Key

**Practice**

**Count on to add.**

Question 1.

27 + 30 = _____________

Answer:

57

Explanation:

Count by 10’s

Start at 27

Count on 37, 47, 57

The sum is 57.

Question 2.

74 + 3 = ______________

Answer:

77

Explanation:

Count by 1’s

Start at 74

Count on 75, 76, 77

The sum is 77.

Question 3.

66 + 3 = _______________

Answer:

Explanation:

Count by 1’s

Start at 66

Count on 67, 68, 69

The sum is 69.

Question 4.

12 + 70 = _______________

Answer:

Explanation:

Count by 10’s

Start at 70

Count on 80

Count by 1’s

Start at 80

Count on 81, 82

The sum is 82.

Question 5.

51 + 3 = _______________

Answer:

Explanation:

Count by 1’s

Start at 51

Count on 52, 53, 54

The sum is

Question 6.

87 + 1 = _____________

Answer:

Explanation:

Count by 1’s

Start at 87

Count on 88

The sum is 88.

Question 7.

Answer:

Explanation:

The sum of 32 and 20 is 52.

Question 8.

Answer:

Explanation:

The sum of 46 and 10 is 56.

Question 9.

Answer:

Explanation:

The sum of 97 and 2 is 99.

Question 10.

Answer:

Explanation:

The sum of 26 and 10 is 36.

Question 11.

Answer:

Explanation:

The sum of 40 and 2 is 42.

Question 12.

Answer:

Explanation:

The sum of 64 and 20 is 84.

Question 13.

The children’s choir sang 17 songs on Wednesday and 2 songs on Thursday. How many songs did they sing in all?

_____________ songs

Answer:

19 songs

Explanation:

The children’s choir sang 17 songs on Wednesday

2 songs on Thursday

Count by 1’s

Strat at 17

Count on 18, 19

The sum is 19

So, the children’s choir sang 19 songs in all.

**Test Practice**

Question 14.

70 + 20 = ____________

(A) 78

(B) 85

(C) 88

(D) 90

Answer:

(D) 90

Explanation:

Count by 10’s

Start at 70

Count on 80, 90

The sum is 90.

**Math at Home** Say a number between 10 and 50. Ask your child to count on by ones. Repeat. Ask your child to count on by tens.

Answer: