Using an open number line, find Springling’s error when subtracting 491 – 288.

by Sherry McElhannon | Apr 20, 2023

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Using the traditional method, find T-Pops’s error when subtracting 548 – 253.

by Sherry McElhannon | Apr 20, 2023

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Using the traditional method, find T-Pops’s error when adding 364 + 327.

by Sherry McElhannon | Apr 20, 2023

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Using partial sums, find Value Pak’s error when adding 245 + 362.

by Sherry McElhannon | Apr 20, 2023

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Using partial sums, find Value Pak’s error when adding 143 + 256.

by Sherry McElhannon | Apr 20, 2023

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