Adding Numbers with Partial Sums

The video tutorial introduces the concept of partial sums in addition, explaining how to use place value to simplify the addition process. It provides several examples, including adding 57 and 28, 24 and 30, 68 and 7, and 45 and 29, demonstrating the step-by-step process of grouping tens and ones to find partial sums and then combining them to get the total sum.

What is the main topic of today's math class?

• Adding with partial sums

• Multiplying with partial products

• Subtracting with partial sums

• Dividing with partial quotients

What is a partial sum?

• The total sum of all numbers

• The difference between two numbers

• The product of two numbers

• The sum of one of the place values

In the example of 57 plus 28, what is the partial sum of the tens?

• 80

• 20

• 70

• 50

How many ones are there in the sum of 57 plus 28?

• 15

• 12

• 10

• 18

What is the total sum of 57 plus 28?

• 105

• 95

• 85

• 75

What is the first step in adding numbers using partial sums?

• Add the ones

• Add the tens

• Add the hundreds

• Add the thousands

In the example of 57 plus 28, how many tens are there in the sum of the ones?

• 4

• 3

• 2

• 1

In the first practice problem, what is the sum of the tens in 24 plus 30?

• 40

• 50

• 30

• 60

What is the total sum of 24 plus 30?

• 44

• 37

• 64

• 54

What is the sum of the ones in 24 plus 30?

• 6

• 7

• 5

• 8