30 : 5 * ☐ = 54
8 * 6 + ☐ = 70
63 : 7 * ☐ = 36
(27 + 18) : ☐ = 5
☐ : (23 − 15) = 7
☐ : (15 − 8) = 7
30 : 5 * 9 = 54
8 * 6 + 22 = 70
63 : 7 * 4 = 36
(27 + 18) : 9 = 5
56 : (23 − 15) = 7
49 : (15 − 8) = 7
Вычисления:
30 : 5 * ☐ = 54
6 * ☐ = 54
☐ = 54 : 6
☐ = 9
8 * 6 + ☐ = 70
48 + ☐ = 70
☐ = 70 − 48
☐ = 22
63 : 7 * ☐ = 36
9 * ☐ = 36
☐ = 36 : 9
☐ = 4
(27 + 18) : ☐ = 5
45 : ☐ = 5
☐ = 45 : 5
☐ = 9
☐ : (23 − 15) = 7
☐ : 8 = 7
☐ = 7 * 8
☐ = 56
☐ : (15 − 8) = 7
☐ : 7 = 7
☐ = 7 * 7
☐ = 49