The Rubik's Cube was created 50 years ago by Hungarian inventor Ernő Rubik. Over 500 million of them have been sold. Needless to say, the 3D puzzle has captured the imagination of countless students ...
Solve one-step word problems using a visual model & a problem-solving process. Warm up with a Mystery Math Mistake to hunt for the mistake in adding two 2-digit numbers using a decomposition strategy.
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