3
(-31)-(-34) = -31+34= 3
Two minuses make a plus
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Negative four
We can convert into seventy-fifths. 6 and nine seventy-fifths minus twenty-five seventy-fifths equals negative 6 and thirty-four seventy-fifths.
422 - 135 = 287
-1 + 1/12 + 1/4 = -2/3
We convert it into thirty-fifths. That gives 15 thirty-fifths minus 14 thirty-fifths which is one thirty fifth.