Multiplying by Multiples of 10

The video tutorial explains how to multiply numbers by multiples of 10. It starts with basic multiplication using repeated addition and the multiplication table. It then addresses the challenge of multiplying by numbers beyond the table's range. The concept of multiples of 10 is introduced, showing how to simplify multiplication by treating numbers like 20 as 2 tens. The tutorial demonstrates this trick with examples, emphasizing that multiplying by multiples of 10 involves multiplying the base number and appending a zero to the result.

What is a quick way to find the result of multiplying 4 by 2?

• Using repeated addition

• Using a calculator

• Using division

• Using subtraction

What is a multiple of 10?

• A number that ends with 9

• A number that ends with 1

• A number that ends with 0

• A number that ends with 5

How can you express 20 in terms of tens?

• 4 tens

• 3 tens

• 2 tens

• 1 ten

If you multiply 5 by 30, what is the first step?

• Multiply 5 by 10

• Multiply 5 by 3

• Add 5 to 30

• Subtract 5 from 30

What is the final result of multiplying 5 by 30?

• 300

• 150

• 30

• 50