4.NOS.B.3: Fluently add and subtract multi-digit whole numbers within 1,000,000. a. Apply estimation strategies to estimate sums and differences. b. Use computational strategies (e.g., decomposition, partials sums) efficiently. c. Use a standard algorithm d. Determine and explain when a strategy or algorithm is most efficient.

Fluently add and subtract multi-digit whole numbers within 1,000,000. a. Apply estimation strategies to estimate sums and differences. b. Use computational strategies (e.g., decomposition, partials sums) efficiently. c. Use a standard algorithm d. Determine and explain when a strategy or algorithm is most efficient.

Example Problems

Add:

17,346 + 92,601

Add:

281,774 + 99,306

Add:

904,611 + 63,289

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