混合
[0]
(-19) − (-9)
=
答え
ｘ
-10
[1]
(+15) ＋ (-8)
=
答え
ｘ
+7
[2]
(-3) ✕ (+2)
=
答え
ｘ
-6
[3]
(+10) ＋ (+11)
=
答え
ｘ
+21
[4]
(+10) ＋ (-8)
=
答え
ｘ
+2
[5]
(+9) ✕ (+2)
=
答え
ｘ
+18
[6]
(+7) ✕ (+4)
=
答え
ｘ
+28
[7]
(+7) ＋ (-13)
=
答え
ｘ
-6
[8]
(+12) ＋ (+9)
=
答え
ｘ
+21
[9]
(-19) ＋ (-18)
=
答え
ｘ
-37
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