Addition Using the Cross 10 Method

The video tutorial teaches how to add two-digit and one-digit numbers using the crossing 10 method. It provides examples of adding 18 and 6, 17 and 5, and 16 and 9. The method involves breaking down the addition into steps that reach a multiple of 10, then adding the remainder. Each example is demonstrated on a number line to visualize the process.

What is the first step in the crossing 10 method when adding 18 and 6?

• Subtract 2 from 18

• Add 6 directly to 18

• Add 2 to 18 to make 20

• Add 4 to 18 to make 22

In the example of 17 + 5, what number do you reach after the first step?

• 18

• 20

• 22

• 19

How many ones are added to 17 to reach 20 in the crossing 10 method?

• 2

• 3

• 4

• 5

What is the final sum when using the crossing 10 method for 16 + 9?

• 23

• 25

• 24

• 26

In the example of 16 + 9, how many ones are added to 16 to make 20?

• 3

• 5

• 6

• 4