1, column vertical: write three numbers in the order from largest to smallest and from left to right on vertical paper to ensure the alignment of each number.
2. Starting from the low bit: starting from a single bit, add and subtract two numbers, and write down the result at the corresponding position. If the result of addition or subtraction exceeds 10, you need to mark carry or borrow in the corresponding position on the next line.
3. Borrow by Carry: When adding, if the addition result exceeds 10, you need to mark carry on the ten digits in the next line; When performing subtraction, if the result of subtraction is less than 10, you need to borrow the top ten coordinates 1.
4. Repeat operation: add and subtract ten digits according to the above method, and write the result in the corresponding position.
5. Verification result: Add all the figures of the calculation result. If the sum is 10, the result is correct; Otherwise, it is necessary to check whether the calculation process is wrong.
Vertical application scenario of three-digit addition and subtraction columns:
1, classroom teaching: In the classroom teaching of primary school mathematics, the addition and subtraction of three digits is a very important teaching content. Through the column and vertical method, students can better understand the principle and calculation method of addition and subtraction, and improve their calculation ability and interest in mathematics.
2. Family education: When parents teach their children mathematics at home, using column and vertical method can make children understand the calculation method of addition and subtraction more intuitively and improve their calculation accuracy and speed. At the same time, this method is also suitable for parents to check their children's calculation results, which is convenient and fast.
3. Self-study practice: Mathematics self-study can consolidate the calculation skills of addition and subtraction, and improve the calculation ability and self-confidence. At the same time, the column vertical method can also help self-learners better understand the principle and algorithm of addition and subtraction.
4. Application in banking, commerce and other fields: In banking, commerce and other fields, it is necessary to add and subtract when calculating the amount. Adding and subtracting vertical columns with three digits can quickly and accurately obtain the calculation results, improving work efficiency and accuracy.
5. Competitions and competitions: In some math competitions and competitions, players need to complete a large number of addition and subtraction problems quickly and accurately. The use of the column vertical method can save time, reduce the possibility of calculation errors, and improve the speed and accuracy of solving problems.