☐ x 3 = 15 - 15 ÷ 3 = ☐, 2 x ☐ = 6 - 6 ÷ 2 = ☐, ☐ x 1 = 6 - 6 ÷ 1 = ☐, 2 x ☐ = 20 - 20 ÷ 2 = ☐, ☐ x 5 = 20 - 20 ÷ 5 = ☐, ☐ x 6 = 30 - 30 ÷ 6 = ☐, 10 x ☐ = 30 - 30 ÷ 10 = ☐, 3 x ☐ = 9 - 9 ÷ 3 = ☐, ☐ x 4 = 12 - 12 ÷ 4 = ☐, 2 x ☐ = 12 - 12 ÷ 2 = ☐,

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