Solution: Align the two addend units, and then add the numbers in the same counting unit respectively. When the addition result exceeds 10, it will reach the high position of 1, and the addition of the high position needs to accumulate the low position result of 1.

Problem solving process:

Step 1: 7+6=3 to the high position 1.

Step 2: 2+3+ 1=6.

According to the above calculation steps, the comprehensive calculation result is 63.

Checking calculation 63-36=27

Extended data-vertical calculation-checking process: align the units of the subtrahend and the minuend, and then subtract them from the numbers in the corresponding counting units respectively. If the drop is not enough, you need to borrow 1 from the high position, and you can get the result through sequential calculation. If the subtrahend is less than the minuend, the two numbers will be exchanged and then subtracted by the minus sign. Fractional subtraction can refer to the integer subtraction step;

Problem solving process:

Step 1: 13-6=7 Borrow from high position 1.

Step 2: 6-3- 1=2

According to the above calculation steps, the comprehensive calculation result is 27.

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