| 1. | When you subtract two numbers, you subtract a subtrahend from a minuend .
当你作两个数的减法时，你用一个被减数去减另一个减数。
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| 2. | When the final borrow is 1, the minuend is reentered into the divided storage register .
当最后借位为1时，将被减数重新存入被除数存贮寄存器。
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| 3. | Look at the minuend and subtrahend . they both add or subtract the same number . the differences are the same
小结：被减数减少(或增加) ，减数也作相应的减少(或增加) ，差不变。
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| 4. | An arithmetically negative carry . it occurs in performing subtraction when the subtrahend is larger than the minuend in a particular digit position
一种算术负进位,它出现在某一特定的数位上减数大于被减数的减法运算中。
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