Más sobre la tabla de multiplicar del nueve

| 9 de agosto de 2008 | Divulgación

Para la colección de curiosidades matemáticas:

9 x 9 + 7 = 88
98 x 9 + 6 = 888
987 x 9 + 5 = 8888
9876 x 9 + 4 = 88888
98765 x 9 + 3 = 888888
987654 x 9 + 2 = 8888888
9876543 x 9 + 1 = 88888888
98765432 x 9 + 0 = 888888888

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  1. -98 x 9 – 6 = -888
    -9 x 9 – 7 = -88
    0 x 9 + 8 =8
    9 x 9 + 7 = 88
    98 x 9 + 6 = 888
    987 x 9 + 5 = 8888
    9876 x 9 + 4 = 88888
    98765 x 9 + 3 = 888888
    987654 x 9 + 2 = 8888888
    9876543 x 9 + 1 = 88888888
    98765432 x 9 + 0 = 888888888
    987654321 x 9 – 1 = 8888888888
    9876543210 x 9 – 2 = 88888888888