MA 04.NBT.B.4 Fluently add and subtract multi-digit whole numbers using the standard algorithm.
Fluently add and subtract multi-digit whole numbers using the standard algorithm.
Good Projects here: https://www.illustrativemathematics.org/content-standards/4
Videos https://learnzillion.com/resources/73029-add-and-subtract-using-the-standard-algorithm-4-nbt-b-4
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