(1) 3 |
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-4 |
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-5 |
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(2) |
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+ |
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- |
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(3) |
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- |
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(4) |
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+ |
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- |
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(5) |
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- |
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+ |
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(6) |
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- |
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+ |
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- |
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(7) |
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- |
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(8) |
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+ |
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(9) |
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- |
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+ |
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(10) |
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+ |
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(11) |
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+ |
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(12) |
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(13) |
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+ |
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+ |
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(14) |
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- |
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+ |
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(15) |
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- |
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+ |
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|
(16) 13 |
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+5 |
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-12 |
( |
6x+ |
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-5 |
( |
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- |
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-3 |
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x- |
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-4 |
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(18) |
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{( |
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{ |
x- |
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)} |
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