the addition form of 5 x 2 is :, 5 + 5 , 2 x 5 , 2 + 2 , the addition form of 3 x 4 is : , 3+3+3, 3 + 3 + 3 + 3, 4 + 4 , 4 x 1 = ..... ?, 5, 1, 4, 7 x 1 = .... ? , 7, 8, 1, .... x 1 = 9 , 9, 8, 1, the multiplication form of 2+2+2+2+2 is :, 2 x 5 , 2 x 6, 2 x 4, the multiplication form of 5 + 5 + 5 is : , 5 x 1, 5 x 3 , 5 x 2, the multiplication form of 1 + 1 + 1 + 1 + 1 +1 is , 6 x 2, 1 x  7, 6 x 1 , A number multiply by 1 is equal to , 1, itself, 0, 1 x 10 =, 10, 11, 1, the multiplication form of 6 + 6 is, 6 x 6, 6 x 3, 6 x 2 .

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