This resource provides a short review for the 3.NBT domain in common core standards. The students will practice rounding to the nearest 10, addition, subtraction, ordering numbers from greatest to least, and multiples of 10. The materials can be easily modified for higher or lower level mathematicians in your class, and includes an answer key.
The rounding refers to a "Cinderella" machine, which uses the Cinderella rounding method. If students are unfamiliar with this strategy, there are severa