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### Course: Operations and Algebraic Thinking 189-200>Unit 5

Lesson 4: Patterns in arithmetic

# Patterns with multiplying even and odd numbers

Sal explores the patterns in products when multiplying even and odd numbers.

## Want to join the conversation?

• I thought the last video said odd times odd equals even?
• The last video said that odd plus odd equals even! It's an important distinction to make
• Is zero negative or positive?
(1 vote)
• Good question! Zero is neither negative nor positive. Think of zero as neutral.

Only the numbers greater than zero are positive, and only the numbers less than zero are negative.

Have a good day!
• Even + Even = Even
Odd + Odd = Even
Even + Odd = Odd
---------------------
Even x Even = Even
Odd x Odd = Odd
Even x Odd = Even
• At of the video, David talks about that odd + odd = odd. But that doesn't make sense.. Because in "Intro to even and odd numbers", didn't he say that odd + odd = even?? & doesn't 3 x 3 = 6, 6 x 2 = 12, & 10 x 4 = 40-? I'm not sure if we really get this video.
• That is because in the other video was abourt addition. This is about multiplication.
• What’s about odd 3 times odd 3 equals even 6
• Hey there. It appears you didn't multiply correctly, or you mistook it as `3+3`.
`3*3 = 3+3+3 = 9`
`3` is odd and `9` is odd, so it obeys the multiplication fact: `odd * odd = odd`.
Hope this clears things up!
• I'm 80 years old
(1 vote)
• is it a and c
(1 vote)
• did you know that 0 is even because 1 is odd and 0 is before 1.
(1 vote)
• that is super duper true