1. Determine the minuend and the minuend: write the minuend and the minuend in two digital cells respectively.
2. Calculate the difference: subtract the minuend from the minuend to get the difference.
3. Borrow 10: If the difference is less than 10, ten digits borrow 10, ten digits subtract 1, and single digits add 10.
4. Calculation result: Add the lent 10 and the difference to get the final result.
Borrow knowledge about 10 method.
The method of borrowing 1 and 10 is the calculation method of two-digit subtraction. Its main idea is to use high-order 10 to help the subtraction of one digit. This method is widely used in primary school mathematics education and can help students master subtraction calculation more easily.
2. We need to know the lending principle of 10. In the two-digit subtraction, if the single digit of the minuend is greater than the single digit of the minuend, then we can borrow 10 from the tenth digit. This 10 can be used to subtract the reduced single digits, thus making the calculation simple.
3. When we subtract two digits, we can divide the minuend and the minuend into two parts: ten digits and one digit respectively. Then we can compare the reduced units with the reduced units. If the minuend unit is greater than the minuend unit, then we can borrow 10 from the tenth minuend unit and add it to the minuend unit.
We can calculate 26- 18 by borrowing 10. First, we divide 26 into 20 and 6, and 18 into 10 and 8. Then, we compare the 6th bit of 26 with the 8th bit of 18. Since 6 is less than 8, we need to borrow 10 from the tenth place of 26. So we can add 10 to the unit of 26, so that the unit becomes 16.
5. The advantage of borrowing 10 method is that the subtraction of two digits can be converted into a simple subtraction of one digit, thus reducing the calculation difficulty. At the same time, this method can also help students better understand the concept and operation rules of decimal system. By borrowing 10 method, students can better master the skills and methods of two-digit subtraction, and improve their computing ability and mathematical level.
6. Besides 10 method, there are other calculation methods that can be used for two-digit subtraction. For example, we can use the vertical calculation method to calculate the subtraction of two digits. This method requires students to list the vertical forms manually, and then perform the corresponding subtraction operation according to the digits of one and ten.