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Nine plus a few equals six.

The answer to this question is negative three. 9+(-3)=6。 Negative number is a mathematical term. Numbers less than 0 are called negative numbers, and negative numbers and positive numbers represent quantities with opposite meanings. The "-"before the number is called the minus sign. For example, this problem, it goes 9 meters forward, 3 meters backward, and finally stops at 6 meters. Another example is taking the elevator, going up to the ninth floor, going down to the third floor and finally stopping at the sixth floor.