Multiplication expanded form

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Expanded form method: 356 x 3 =

(300x3) + (50x3) + (6x3) = 900 + 150 + 18 = 1068

Expanded form method: 405 x 6 =

(400x6) + (00x6) + (5x6) = 2400 + 0 + 30 = 2430

Use doubling: 323 x 2 =

323 + 323 = 646

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