☐
4 * ☐ = 32
9 * ☐ = 27
☐ * 4 = 24
36 : ☐ = 9
18 : ☐ = 2
28 : ☐ = 7
43 − 40 + ☐ = 12
38 − ☐ + 49 = 79
68 − ☐ − 20 = 40
4 * 8 = 32
9 * 3 = 27
6 * 4 = 24
36 : 4 = 9
18 : 9 = 2
28 : 4 = 7
43 − 40 + 9 = 12
38 − 8 + 49 = 79
68 − 8 − 20 = 40