解：根据题意，有被除数+除数+商+余数=454，因被除数=除数*商+余数，所以得除数*商+余数+除数+商+余数=454，解得除数=30。综合算式为：（454-12-26-26）/（12+1）=390/13=30所以除数是30
(454-12-26)/(12+1)=32
[(454-12-26)-26]/13=390/13=30除数是:30
[(454-12-26)-26]/13=390/13=30
