加法

[0]	(-6) ＋ (-16)	=	答え ｘ -22
[1]	(+15) ＋ (-15)	=	答え ｘ 0
[2]	(+17) ＋ (-14)	=	答え ｘ +3
[3]	(+19) ＋ (+11)	=	答え ｘ +30
[4]	(+6) ＋ (+9)	=	答え ｘ +15
[5]	(+14) ＋ (-7)	=	答え ｘ +7
[6]	(-17) ＋ (+15)	=	答え ｘ -2
[7]	(+12) ＋ (-18)	=	答え ｘ -6
[8]	(+16) ＋ (+15)	=	答え ｘ +31
[9]	(-13) ＋ (+12)	=	答え ｘ -1

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