To figure out what tiles should go in the last position, we can think about the answer. We know that 0 • 0 = 0, so the final tile we put in the lower right position has to make the answer zero.

A red tile would make the answer 2, so that can't be right.

A yellow tile would make two zero pairs, so the answer would be 0.  Therefore 1 • 1 must be a yellow tile. 

☐ OK, show me the final video.  

☐ I'd like to review the video about multiplying red numbers by red numbers.

☐ I'd like to review another video.