Rob explains the difference between one-, two-, and three-digit numbers. He then walks through the technique for adding whole numbers together regardless of the number of digits in each number.
Hacker has captured the king of Happily Ever Afterville and demands a ransom of 1,300 golden eggs. The CyberSquad and the residents work together to count the number of golden eggs they've accumulated. Then they use multi-digit addition to determine if they have enough eggs to meet Hacker's ransom.