If you're seeing this message, it means we're having trouble loading external resources on our website.

If you're behind a web filter, please make sure that the domains *.kastatic.org and *.kasandbox.org are unblocked.

### Course: Get ready for 4th grade>Unit 3

Lesson 4: Multiplication with arrays

# Multiplication with arrays

Let's explore this video about representing 12 with multiplication. It shows 12 as 4x3, 3x4, 2x6, 6x2, 1x12, and 12x1. This helps students understand multiplication and different group arrangements. Created by Sal Khan.

## Want to join the conversation?

• is addition the same thing as multiplication
• In a way, yes.

Multiplication is simply a faster method of addition. When you multiply a number by another number, you are basically adding a number the same amount of times as the other number calls for, e.g: 5*3 = 5+5+5 and 3*5 = 3+3+3+3+3.

Hope this helps!
• how do you do multiplication
• you can do this 5x4=20
• why not show in this video, that making groups of 5 or 7 is not possible?
• It is possible, but in multiplication you always want even groups.
• What number comes after googlplex?
• Really any number that has one or more zeros can come after a googolplex because numbers exist into infinity but if you are asking what the largest named number is then it would be both a googolplexian and like Sajjad-Bin-Samad said the Graham's number.
• is this like a start to multiplication? If it is, why is it for third grade?
• Yes, groups of objects is the basic meaning of multiplication. Multiplication is taught in 3rd grade.

You don’t always have to draw groups of objects to multiply numbers, but it is good to mentally visualize groups of objects.

Have a blessed, wonderful day!
• so yore saying you multiply 3 groups of 4 3 times fore everything it would be 12?
• Yes it Will be 12