Oblicz jak na przykładzie: Przykład: 7x28 = 7 x (20 + 8) = 7 x 20 + 7 x 8 = 140 + 56 = 196 7 x 28 = 7 x (30 - 2) = 7 x 30 - 7x2 = 210 - 14 = 196 b) 8 x 48 = 8 x (...+...) = 8 x 48 = 8 x (...-...)
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8 x 48 = 8 x (40 + 8) = 8 x 40 + 8 x 8 = 320 + 64 = 384
8 x (50-2) = 8 x 50 - 8 x 2 = 400 - 16 = 384