Mastering Multiplication with Tens

The video tutorial explains how to multiply numbers by multiples of ten. It begins with a simple example of multiplying 4 by 20, illustrating the concept of multiples of ten. The tutorial defines multiples of ten and demonstrates a trick to simplify multiplication by these numbers. Another example is provided with 5 multiplied by 30, reinforcing the method. The lesson concludes with a summary of the key points covered.

What is the result of multiplying 4 by 2?

• 10

• 12

• 6

• 8

Why can't we use the multiplication table to find the result of 4 multiplied by 20?

• The table only goes up to 15

• The table only goes up to 20

• The table only goes up to 25

• The table only goes up to 10

What is a number that ends with a zero called?

• Multiple of twenty

• Multiple of two

• Multiple of ten

• Multiple of five

How can we think of the problem 4 multiplied by 20?

• Multiplying 4 by 2 and then adding 10

• Multiplying 4 by 2 tens

• Multiplying 4 by 2 and then subtracting 10

• Multiplying 4 by 2 and then adding 20

What is the result of 4 multiplied by 20?

• 100

• 80

• 60

• 40

What is the trick for multiplying a number by a multiple of ten?

• Multiply the number by the tens and then add a zero

• Multiply the number by the tens and then subtract ten

• Multiply the number by the tens and then subtract a zero

• Multiply the number by the tens and then add ten

What is the result of 5 multiplied by 30?

• 150

• 120

• 100

• 180

How many tens are there in thirty?

• 2

• 3

• 4

• 5

What did you learn in this lesson?

• Multiplying numbers by multiples of five

• Multiplying numbers by multiples of ten

• Multiplying numbers by multiples of twenty

• Multiplying numbers by multiples of two