Sum of Digits and Addition

Mrs. Lambert guides students and parents through the process of adding three and four numbers. She provides multiple examples and emphasizes the importance of using number combinations and making tens to simplify addition. Different methods are explored to solve the same problem, encouraging students to find the approach that works best for them. The video concludes with an invitation to contact her with questions.

What is the sum of 23, 20, and 5?

• 58

• 48

• 68

• 78

When adding 23, 20, and 5, what is the sum of the ones place digits?

• 0

• 8

• 5

• 3

What is the sum of 13, 52, and 34?

• 89

• 99

• 109

• 119

In the example of 13, 52, and 34, what is the sum of the tens place digits?

• 6

• 7

• 9

• 8

What is the sum of 31, 45, and 24?

• 120

• 90

• 100

• 110

Why is it important to know combinations of numbers that equal 10?

• It helps in multiplication

• It helps in division

• It helps in subtraction

• It makes addition easier

What is the sum of 18, 32, 23, and 3?

• 66

• 76

• 86

• 96

In the example of 18, 32, 23, and 3, what is the sum of the ones place digits?

• 6

• 7

• 8

• 9

What is the sum of 45, 31, 29, and 72?

• 197

• 187

• 177

• 167

In the example of 45, 31, 29, and 72, what is the sum of the tens place digits?

• 11

• 10

• 12

• 13