Question: A student believes that subtraction problems can be solved by highlighting the distance between two numbers, as shown below: Why will this method not

A student believes that subtraction problems can be solved by highlighting the

A student believes that subtraction problems can be solved by highlighting the distance between two numbers, as shown below: Why will this method not always work? Problem: Evaluate 3 - -4. There are 7 units, so 3-4 = 7.

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