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Teaching addition using an open number line with visual examples for 37 + 48.

A smiling child with curly hair stands beside a math diagram showing "Adding on an Open Number Line" with the equation 37 + 48 illustrated using three different number line strategies.

A smiling child with curly hair stands beside a math diagram showing "Adding on an Open Number Line" with the equation 37 + 48 illustrated using three different number line strategies.

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