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Numbertime Addition and Subtraction, Addition and Subtraction: Two step subtraction Clips

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  1. Strategies for subtracting tens and near tens

    Duration: 02:18

  2. Strategies for subtracting tens and near tens

    Duration: 02:21

  3. Estimation - rounding numbers

    Duration: 02:16

  4. Approximation and rounding in subtraction

    Duration: 01:36