The addition and subtraction sign should be written in front of the two additions and subtractions, not below. Note: When each bit is subtracted to get 0, each bit should be written with 0; Subtract ten digits to get 0, and ten digits will not be written.

There are two simple ways to write about Jia Lian. If you enter 2, you should write 2.

There are two simple ways to write about Jia Lian. If you enter 2, you should write 2.

Summary:

The format of exercise books is strictly in accordance with the following requirements:

1, the horizontal formula is written from the left end of the horizontal grid line in the math book.

2. Vertical style: the first addend of horizontal style is written below the second addend, and the plus sign of horizontal style is aligned with the plus sign. The same numbers of addend, addend and sum must be aligned.

3. After calculating the vertical columns, don't miss the horizontal numbers.