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## Early math review

### Course: Early math review>Unit 4

Sal shows how to relate repeated addition to an array. Created by Sal Khan.

## Want to join the conversation?

• Hi I have one question what is a array?
• An array is a way to represent multiplication using rows and columns. Hope that answers your question!
• Why can't they just do 5 times 3 instead of addition?
• We can use multiplication but addition is simpler form of multiplication.
• what is 300 + 900 =
• 900 hundred + 300 hundred is... lets look at this 9 plus 3 and that's 12 s its 1012 because you added 3 to nine and we cant make it 112 because that will be subracting to we have to use addition! Hope this helped :)
• I have one question what is 900+900
• 900 + 900 is 1800 because 9 + 9 = 18 and since it is 900 you have to times it by 100 at the end ( if you are making it simpler) and you get 1800!

Hope this helps!
• are any of you going to anser
• how do you change your avatar
• what is an arrey
(1 vote)
• Think of an array as a grid with rows and columns. For example if you look at a chessboard, you will see an 8 by 8 array of squares.

Have a blessed, wonderful day!