Solution: Align the two addend units, and then add the numbers in the same counting unit respectively. If the addition result exceeds 10, the high bit of 1 will be removed, and the addition of the high bit needs to accumulate the low bit of 1.

Problem solving process:

Step 1: 2+6=8

Step 2: 8+7=5 to the high position, 1.

According to the above calculation steps, the comprehensive calculation result is 158.

Checking calculation: 158-76=82

Extended data (check result): align the units of the minuend and the minuend, and then subtract them from the numbers in the corresponding counting units respectively. If the subtraction is not enough, you need to borrow 1 from the high position, and then calculate the results in turn. If the subtraction is less than the minuend, add a negative sign to the final result of subtraction. Fractional subtraction can refer to the integer subtraction step;

Problem solving process:

Step 1: 8-6=2

Step 2: 15-7=8 Borrow from high position 1.

Step 3: 1-0- 1=0.

According to the above calculation steps, the comprehensive calculation result is 82.

If in doubt, please ask questions. If satisfied, please adopt them.