38 : 2 * 4 = (20 + 18) : 2 * 4 = (20 : 2 + 18 : 2) * 4 = (10 + 9) * 4 = 10 * 4 + 9 * 4 = 40 + 36 = 76
 
75 : 3 * 2 = (60 + 15) : 3 * 2 = (60 : 3 + 15 : 3) * 2 = (20 + 5) * 2 = 20 * 2 + 5 * 2 = 40 + 10 = 50
 
90 : 6 * 4 = (60 + 30) : 6 * 4 = (60 : 6 + 30 : 6) * 4 = (10 + 5) * 4 = 10 * 4 + 5 * 4 = 40 + 20 = 60
 
45 : 3 * 6 = (30 + 15) : 3 * 6 = (30 : 3 + 15 : 3) * 6 = (10 + 5) * 6 = 10 * 6 + 5 * 6 = 60 + 30 = 90
 
84 : 2 * 1 = (80 + 4) : 2 * 1 = (80 : 2 + 4 : 2) * 1 = (40 + 2) * 1 = 42 * 1 = 42
 
66 : 3 * 0 = (60 + 6) : 3 * 0 = (60 : 3 + 6 : 3) * 0 = (20 + 2) * 0 = 20 * 0 = 0
 
36 : 2 * 5 = (20 + 16) : 2 * 5 = (20 : 2 + 16 : 2) * 5 = (10 + 8) * 5 = 10 * 5 + 8 * 5 = 50 + 40 = 90
 
72 : 4 * 3 = (40 + 32) : 4 * 3 = (40 : 4 + 32 : 4) * 3 = (10 + 8) * 3 = 10 * 3 + 8 * 3 = 30 + 24 = 54
 
56 : 4 * 7 = (40 + 16) : 4 * 7 = (40 : 4 + 16 : 4) * 7 = (10 + 4) * 7 = 10 * 7 + 4 * 7 = 70 + 28 = 98
 
84 : 6 * 3 = (60 + 24) : 6 * 3 = (60 : 6 + 24 : 6) * 3 = (10 + 4) * 3 = 10 * 3 + 4 * 3 = 30 + 12 = 42
 
91 : 7 * 6 = (70 + 21) : 7 * 6 = (70 : 7 + 21 : 7) * 6 = (10 + 3) * 6 = 10 * 6 + 3 * 6 = 60 + 18 = 78
 
85 : 5 * 4 = (50 + 35) : 5 * 4 = (50 : 5 + 35 : 5) * 4 = (10 + 7) * 4 = 10 * 4 + 7 * 4 = 40 + 28 = 68