Multiplication Strategies and Techniques

This video tutorial teaches how to multiply numbers fluently by using tens facts and the commutative property. It explains how to simplify multiplication problems by subtracting from groups of ten, using examples like four times nine, six times nine, and nine times eight. The lesson emphasizes the efficiency of this strategy and reinforces understanding of multiplication properties.

Why is it helpful to know tens facts when solving multiplication problems?

• It is useful for solving subtraction problems.

• It improves division skills.

• It helps in quickly solving multiplication by subtracting from groups of ten.

• It makes addition easier.

What is the product of three times ten?

• 40

• 50

• 30

• 20

How does the commutative property of multiplication help in solving problems?

• It helps in dividing numbers easily.

• It allows you to add numbers in any order.

• It lets you multiply numbers in any order and still get the same product.

• It is useful for subtracting numbers.

What is the first step in multiplying four times nine using the tens strategy?

• Add four to ten.

• Multiply four by ten.

• Subtract four from ten.

• Divide four by ten.

After calculating four times ten, what is the next step to find four times nine?

• Add one to each group.

• Subtract one from each group.

• Multiply by two.

• Divide by two.

What is the result of six times nine using the subtraction strategy?

• 66

• 60

• 54

• 48

How many dots are subtracted in total when using the tens strategy for six times nine?

• Seven

• Five

• Four

• Six

What is the first step in solving nine times eight using the tens strategy?

• Multiply nine by ten.

• Multiply eight by ten.

• Add eight to ten.

• Subtract eight from ten.

What is the final result of nine times eight using the subtraction strategy?

• 64

• 72

• 80

• 88

How many dots are subtracted in total when using the tens strategy for nine times eight?

• Seven

• Eight

• Nine

• Ten