The critical aspects for subtraction with negative number
| Aspect number | Definition |
|---|---|
| CA1 | The number system of integers |
| CA2 | The twofold meaning of the minus sign |
| CA3 | Subtraction can be interpreted as a difference |
| CA4 | The commutative law does not apply in subtraction |
| Aspect number | Definition |
|---|---|
| CA1 | The number system of integers |
| CA2 | The twofold meaning of the minus sign |
| CA3 | Subtraction can be interpreted as a difference |
| CA4 | The commutative law does not apply in subtraction |
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