AAA Math
Aaa Math: Two Digit Addition Equations
Learn how to solve two-digit addition problems, and then practice the skill with interactive problems.
Illustrative Mathematics
Illustrative Mathematics: 2.nbt Many Ways to Do Addition 2
This lesson plan has students exploring was to add and subtract numbers with multi-digits and place value.
Illustrative Mathematics
Illustrative Mathematics: Toll Bridge Puzzle
You are on a trip and need to cross a bridge, but you have to pay tolls in coins. Solve this puzzle by making your way to the island only using 100 coins.