Following the pattern in the examples:

1. $74 + 81 = 15$

   • Taking the difference: $81 - 74 = 7$
   • Then multiplying by 2: $7 \times 2 = 14$
   • Finally, add 1: $14 + 1 = 15$

2. $92 + 23 = 11$

   • Taking the difference: $92 - 23 = 69$
   • Divide by 6: $69 / 6 = 11.5$, and rounding gives 11

Now, following this pattern for $87 + 43$: