Multiplication Strategies and Concepts

This video tutorial teaches strategies for multiplying two-digit by one-digit numbers by breaking apart arrays into manageable multipliers. It begins with an introduction to the concept, followed by examples using groups of seven and multi-digit numbers. The tutorial demonstrates how to simplify multiplication by breaking apart numbers like 27 into smaller, more manageable parts. The lesson concludes with a recap of the strategies covered.

What is the main strategy discussed for multiplying two-digit by one-digit numbers?

• Using a calculator

• Breaking apart arrays into smaller multipliers

• Adding the numbers repeatedly

• Using division to simplify

If you have five groups of seven, what is the total?

• 28

• 56

• 21

• 35

How can you simplify counting by 27s?

• By subtracting 5 from each group

• By adding 10 to each group

• By splitting 27 into 10 plus 10 plus 7

• By multiplying by 2

What is the result of 4 groups of 10 plus 4 groups of 7?

• 108

• 28

• 100

• 80

What is the simplified form of 27 used in the lesson?

• 15 plus 12

• 20 plus 7

• 10 plus 17

• 20 plus 5

How is 4 times 2 related to 4 times 20?

• 4 times 2 is double 4 times 20

• 4 times 20 is 10 times greater than 4 times 2

• 4 times 2 is half of 4 times 20

• They are equal

What is the total of 80 plus 28?

• 118

• 98

• 108

• 100

What is the purpose of breaking apart arrays in multiplication?

• To make the numbers larger

• To simplify the multiplication process

• To make the numbers smaller

• To avoid using multiplication

What is the final total when combining 80 and 28?

• 108

• 100

• 88

• 118

What is the key takeaway from the lesson?

• Multiplication is always difficult

• Breaking apart numbers can simplify multiplication

• Always use a calculator

• Addition is better than multiplication