Question

3) A first grader claims that 2-4 = 0 because you can't have anything less that nothing.
How do you respond? (be very specific; use a concrete example and remember that
young children do not understand the abstract concept of negative numbers)

Answer 1

The value of the expression 2 - 4 is - 2 ; which can be illustrated using the concept Analysed below.

For instance :

• You have 2 biscuits and you owe your friend 4 biscuits which you collected from her at school.

• To repay your friend, you give her the 2 biscuits you have which is the essence of the subtraction operation.

• After giving her the two biscuits you have 0 left, however, you still haven't settled your friend. The number of biscuits you have to give your friend in other to finally settle her is the answer to the expression (2 - 4) = - 2

• The essence of the negative value is to show that, you still have a deficit of 2 biscuits to give your friend in other to settle your debt.

Therefore, the answer to the expression 2 - 4 = - 2

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