8 - 4 ⋅ 2, 12 - 4 ⋅ 3, 16 - 4 ⋅ 4, 20 - 4 ⋅ 5, 24 - 4 ⋅ 6, 28 - 4 ⋅ 7, 32 - 4 ⋅ 8, 36 - 4 ⋅ 9, 40 - 4 ⋅ 10,

Multiplikation med 4

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