Use the method of ten: 8+6 = 8+2+4 =10+4 =14.

Second, about the method of filling ten.

1, rounding ten: adding another number to a number to make it "ten" is called rounding ten. For example, add "2" to "8" to make it full of "10".

2. Sum of Ten: When calculating the sum of several numbers, the method that the sum is two tens or dozens of numbers, or the sum of single digits is two or three tens is called the sum of ten. With the method of ten, the result can be calculated quickly.

3. Rounding method is the basis of rounding method. Is the simplest and most elementary rounding method.

4. Rounding method: When several numbers are added, first calculate the numbers that can add up to whole ten, whole hundred, whole thousand and whole ten thousand. According to one addend, one addend increases and the other addend decreases by the same number, and their sum remains unchanged. Turn a number close to whole ten, whole hundred, whole thousand and whole ten thousand into a number of whole ten, whole hundred, whole thousand and whole ten thousand. Among the fast calculation methods of addition and subtraction, rounding is the most commonly used and the best method.

(Reference:

Interactive Encyclopedia: Ten Ways)