Warm up with a Mystery Math Mistake to decompose teen numbers. Use a double 10-frame to represent adding three single-digit numbers. Play a game with 10-frame cards to add numbers. The one with the greatest number wins!

Mrs. Markavich and Value Pak need your help to decompose numbers by place value in their number bonds.

Join Mrs. Ignagni for a Mystery Math Mistake with T-Pops. See if you can be a detective and figure out what step T-Pops forgot in the traditional method!