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# Multiplication with arrays

Sal uses arrays to show different ways to multiply and get the same solution. Created by Sal Khan.

## Want to join the conversation?

• how do you do multiplication
• you can do this 5x4=20
• 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!
• 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.
• so yore saying you multiply 3 groups of 4 3 times fore everything it would be 12?
• Yes it Will be 12
(1 vote)
• this video is inchresting like you said
• What if you had to add with multiblecation?
• Its multiplication. Not multiblecation.

Thank you!