12 x 18
= 12(9 + 9)
= 12 x 9 + 12 x 9
= 108 + 108
= 200 + 16
= 216
*I know my multiplication facts of 12. Also, I often think in feet and inches: 12 inches in a foot, 9 feet = 9 x 12" = 108".

Look what arrived! Just when you thought the K-5 book was big, the 6-12 is even thicker!
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Learn more about this new tile in this video: youtu.be/Xa7OF-TLC9s

@mathigon.bsky.social @polypad.bsky.social