Multiplying by Multiples of Ten

The video tutorial covers multiplying numbers by multiples of ten. It begins with an introduction to the concept and lists multiples of ten up to 150. The instructor then provides several examples, demonstrating how to multiply numbers by multiples of ten by focusing on the non-zero digits and then adding the zero back to the result. Examples include calculations like 5 times 70, 40 times 9, 2 times 60, 8 times 90, and 50 times 7.

What is the main topic of the lesson?

• Multiplying by multiples of ten

• Adding multiples of ten

• Subtracting multiples of ten

• Dividing by multiples of ten

Which of the following is a multiple of ten?

• 25

• 35

• 15

• 40

Which of the following is NOT a multiple of ten?

• 45

• 30

• 90

• 60

How do you simplify the multiplication of 5 by 70?

• Multiply 5 by 7 and add a zero

• Multiply 5 by 7 and subtract a zero

• Multiply 5 by 10

• Multiply 5 by 70 directly

What is the result of 5 times 70?

• 350

• 360

• 370

• 340

What is the first step in multiplying 40 by 9?

• Multiply 4 by 10

• Multiply 40 by 9 directly

• Multiply 4 by 9

• Multiply 40 by 10

What is the result of 40 times 9?

• 360

• 390

• 370

• 340

What is the result of multiplying 4 by 9 in the context of the lesson?

• 36

• 39

• 33

• 34

How do you simplify the multiplication of 2 by 60?

• Multiply 2 by 6 and subtract a zero

• Multiply 2 by 60 directly

• Multiply 2 by 6 and add a zero

• Multiply 2 by 10

What is the result of 2 times 60?

• 120

• 130

• 110

• 140