Decomposing Numbers for Multiplication Mastery

What is the main strategy discussed in the introduction for making multiplication easier?

• Using addition only

• Decomposing one of the factors

• Using a calculator

• Memorizing all multiplication tables

Which numbers are considered easier to multiply according to the introduction?

• 7s and 8s

• 2s and 3s

• 5s and 10s

• 9s and 11s

How can you rewrite 8 times 6 using repeated addition?

• 6 + 6 + 6 + 6 + 6

• 8 + 8 + 8 + 8 + 8

• 6 + 6 + 6 + 6 + 6 + 6

• 8 + 8 + 8 + 8 + 8 + 8

What is the result of 8 times 5?

• 45

• 40

• 30

• 35

How can you use the distributive property to solve 8 times 6?

• 8 times (5 plus 1)

• 8 times (6 plus 1)

• 8 times (4 plus 2)

• 8 times (3 plus 3)

What is the sum of 8 times 5 and 8 times 1?

• 48

• 47

• 46

• 45

How is 7 times 9 related to 7 times 10?

• 7 times 9 is one more 7 than 7 times 10

• 7 times 9 is one less 7 than 7 times 10

• 7 times 9 is unrelated to 7 times 10

• 7 times 9 is the same as 7 times 10

What is the result of 7 times 10?

• 60

• 63

• 77

• 70

What do you get when you subtract one 7 from 70?

• 63

• 60

• 67

• 65

What is a key takeaway from the lesson about using 5s and 10s facts?

• They make multiplication harder

• They should be avoided

• They make solving problems easier

• They are not useful