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81 3 9
9 x 3 + 5 =
81 1 9
27 + 5 =
81 9
27 x 1 + 5 x 9 = 27 + 45 = 72 = 24 = 8
81 1 9 9 81 81 81 27 9
b) 2 ÷ 1 x 4 =
3 3 10
2 x 3 x 4 =
3 1 10
6 x 4 = 24 = 12 = 4
3 10 30 15 5
c) 3 x 2 ÷ 1 =
8 5 10
6 ÷ 1 =
40 10
6 x 10 = 60 = 30 = 15 = 3
40 1 40 20 10 2
esta es la respuesta