Multiplication with Arrays

This video tutorial teaches multiplication using arrays. It begins with an introduction to multiplication concepts, including factors and products. The lesson then explains multiplication as repeated addition and demonstrates how to use arrays to visualize multiplication problems. Common misunderstandings are addressed, and the tutorial concludes with applying these concepts to solve word problems.

What are the numbers called that are multiplied together in a multiplication sentence?

• Products

• Divisors

• Factors

• Multiples

How can the multiplication 5 * 4 be represented using repeated addition?

• 5 + 5 + 5 + 5

• 4 + 4 + 4 + 4 + 4

• 4 * 5

• 5 + 4

In an array, what do the rows and columns represent?

• Rows represent columns, and columns represent rows

• Rows and columns both represent the product

• Rows represent the first factor, and columns represent the second factor

• Rows represent the product, and columns represent the factors

What is the product of 6 * 3 when using an array?

• 12

• 15

• 21

• 18

What mistake might occur when adding objects to an array?

• Adding objects to the end of the row instead of within it

• Using different shapes for objects

• Adding objects in the wrong row

• Counting objects twice

How many vitamins are needed in total if each of the 4 cats needs 9 vitamins?

• 27

• 36

• 54

• 45

What multiplication sentence represents the problem of feeding vitamins to cats?

• 3 * 9

• 4 * 9

• 5 * 9

• 4 * 8