1745
+ 567
————
23 12
If the same number is aligned, borrow 1 from the previous number as 10 if it is not reduced enough.
1745
- 567
————
1 178
When the columns are vertical, start from each position and align the corresponding positions. When calculating, start from right to left and add and subtract the corresponding numbers. In addition, if the total exceeds ten, count to the left; In subtraction, it is not enough to subtract one from the left digit. The digit is ten * and the left digit is subtracted by one.
1. Increase or decrease; Add or delete. 2. Chinese medicine prescription, according to the ancient decoction, taking into account the patient's situation, add and subtract several herbs, called XXX decoction addition and subtraction. 3. An ancient opera. Its method has been lost. 4. The meanings of Minnan and Taiwanese are more or less full of life. For example, "add and subtract to earn" means earning more or less, and earning less means earning less. 5. Mathematical operation symbols