減法
| [0] | (-10) − (+14) | = | |
| [1] | (-6) − (-11) | = | |
| [2] | (+8) − (-17) | = | |
| [3] | (-11) − (-18) | = | |
| [4] | (+11) − (-15) | = | |
| [5] | (-6) − (-9) | = | |
| [6] | (+9) − (+9) | = | |
| [7] | (+16) − (-14) | = | |
| [8] | (-18) − (-18) | = | |
| [9] | (-16) − (-11) | = |
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