乗法

[0] (+4) ✕ (-2) =

-8

[1] (+2) ✕ (+3) =

+6

[2] (-5) ✕ (-3) =

+15

[3] (+5) ✕ (+8) =

+40

[4] (+2) ✕ (-2) =

-4

[5] (-6) ✕ (+9) =

-54

[6] (-6) ✕ (+3) =

-18

[7] (+8) ✕ (-4) =

-32

[8] (+4) ✕ (+3) =

+12

[9] (+7) ✕ (+8) =

+56




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