6. 4 &#x000000d7&#x00000020& & 4

4 × & 4 = 16 + 4 = 20
6 × & 6 = 18 + 6 = 24
8 × & 3 = 18 - (15 - 7) = 18 - 8 = 10
7 × & 3 = 40 + (9 + 13) = 40 + 22 = 62