乗法
[0]
(-2) ✕ (+4)
=
答え
x
-8
[1]
(+4) ✕ (-3)
=
答え
x
-12
[2]
(-7) ✕ (+3)
=
答え
x
-21
[3]
(-6) ✕ (-8)
=
答え
x
+48
[4]
(+7) ✕ (+8)
=
答え
x
+56
[5]
(-3) ✕ (-5)
=
答え
x
+15
[6]
(+3) ✕ (-6)
=
答え
x
-18
[7]
(+7) ✕ (+6)
=
答え
x
+42
[8]
(+7) ✕ (+9)
=
答え
x
+63
[9]
(-4) ✕ (+6)
=
答え
x
-24
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