In this video, the teacher demonstrates how to use an open number line to add two-digit numbers. The first example involves adding 48 and 10, emphasizing the use of tens and ones. The second example adds 58 and 22, illustrating the use of big jumps for tens and small jumps for ones. The video concludes with a reminder to practice in class.

What is the main topic of today's video?

• Using an open number line to add two-digit numbers

• Subtracting two-digit numbers

• Dividing two-digit numbers

• Multiplying two-digit numbers

Where should you place the number 48 on the number line?

• At the end

• At the beginning

• In the middle

• Somewhere with plenty of room to add more numbers

What is the result of adding 48 and 10 using the open number line?

• 78

• 68

• 58

• 88

What is a more efficient way to add 10 to 48?

• Counting by twos

• Counting by ones

• Counting by tens

• Counting by fives

How many tens are there in the number 22?

• Four

• One

• Two

• Three

How many ones are there in the number 22?

• Three

• Two

• One

• Four

What is the result of adding 58 and 22 using the open number line?

• 100

• 90

• 80

• 70

What strategy can be used to add the ones after adding the tens?

• Counting back strategy

• Division strategy

• Multiplication strategy

• Counting on strategy

What is the sum of 58 plus 10?

• 68

• 98

• 78

• 88

What will be practiced further in class?

• Subtraction using an open number line

• Division using an open number line

• Multiplication using an open number line

• Addition using an open number line