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: 6+4=0 to the high position, 1.
Step 2: 5+4+ 1=0, and move to the high position of 1
According to the above calculation steps, the combined calculation result is 100.
Checking calculation: 100-56=44
Extended data ← Check the calculation result: align the unit of subtraction with the unit of subtraction, and then subtract them from the corresponding counting units. If the reduction 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, the two numbers are exchanged and subtracted, and a negative sign is added to the final result; Fractional subtraction can refer to the integer subtraction step;
Problem solving process:
Step 1: 10-6=4 Borrow from high position 1.
Step 2: High-level borrowing 10-5- 1=4.
Step 3: 1-0- 1=0.
According to the above calculation steps, the comprehensive calculation result is 44.
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