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bill k
Lv 6
bill k asked in Science & MathematicsMathematics · 4 years ago

Combinations?

What are the possible combinations of plus and minus for using for digits:

For example first two would be:

+ + + +

- - - -

what other cobinations of + and - do we have?

Update:

We are talking about 4 digit spaces. Each space can have either a + symbol or a - symbol.

2 Answers

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  • Lawrence
    Lv 6
    4 years ago

    ----, ---+, --+-, --++, -+--, -+-+, -++-, -+++, +---, +--+, +-+-, +-++, ++--, ++-+, +++-, ++++

    16 total

    Erin you missed ...

    --+-, -+--, -++-, +--+, +-++, ++-+

  • Erin
    4 years ago

    you already said ++++

    +++- ++-- +---

    ---- -+++ --++ ---+ +-+- -+-+

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