Divide the dividend from the high place first. Dividend is 2 digits, just look at the first 2 digits of dividend.

Extended data

When the dividend contains 4, 5 and 6 times divisor, the period method is: the dividend contains 4 times quotient: half of the former complement, and the standard complement is subtracted once.

Dividend includes quotient 5 times: half of complement is added before, and the standard is fixed.

Dividend includes quotient 6: the previous digit is added with half complement, and the previous digit is added with one complement.

Example: 35568+78=456(78' s complement is 22) Sequence: 355 contains a divisor of 4 times, so the leading bit is added with 1 1 and subtracted by 22 to get 4-4368; If the divisor in 436 is 5 times, then add 1 1 to the previous position, and the standard is fixed, and you get 45-468; The divisor in 468 is 6 times, the leading bit is added with 1 1, and the standard is added with 22 to get 456 (quotient).