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e.g. 'a' - ( -a)

becomes

a -- a

a + a = 2a

Here with a table for manipulating 'double' signs.

    • = +
    • = -
    • = -
    • = +

NB If no sign is shown in front of a number , then read the number as plus(O).

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lenpollock

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8mo ago

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More answers

The rule for subtracting negative numbers is 'when you are subtracting a negative number from a positive or negative, you must always add it.'

Example: 3--3 = 3+3 = 6

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Wiki User

15y ago
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Q: What is the rule for subtracting negative numbers?
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