加法

[0] (-18) + (+10) =

-8

[1] (+9) + (-13) =

-4

[2] (-7) + (-15) =

-22

[3] (+6) + (+17) =

+23

[4] (-18) + (+14) =

-4

[5] (-9) + (+13) =

+4

[6] (+18) + (+19) =

+37

[7] (+19) + (-7) =

+12

[8] (+10) + (+14) =

+24

[9] (-12) + (+19) =

+7




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