General fraction refers to adding and subtracting fractions by changing the denominator of two or more fractions into the same number. The following is the method of the fifth grade mathematics total score:

Firstly, the denominator of the score is decomposed into prime factors, and then their least common multiple (LCM) is found as the denominator of the total score. The least common multiple refers to the minimum multiple shared by multiple numbers. For example, if you want to divide 2/3 and 3/4, you can follow these steps:

Step one: decompose the denominator into prime factors.

2/3 = 2/(2×3)

3/4 = 3/(2×2× 1)

Step 2: Find their least common multiple.

2×2×3 = 12

So 12 is the least common multiple of 2/3 and 3/4.

Step 3: Change the denominators of the two fractions to 12, and multiply the numerator by the corresponding number at the same time, so that the values of the fractions remain unchanged.

2/3 = (2×4)/(3×4) = 8/ 12

3/4 = (3×3)/(4×3) = 9/ 12

Now, the denominator of these two fractions is 12, which can be added or subtracted. The result is:

2/3 + 3/4 = 8/ 12 + 9/ 12 = 17/ 12

Because 17/ 12 can no longer be reduced, the result is the simplest fractional form.

Therefore, the steps of sharing can be summarized as follows:

1. Denominator prime factor of decomposition fraction;

2. Find the least common multiple of these denominators as the denominator of the total score;

3. Multiply the numerator and denominator of each fraction by an appropriate number to make the denominator equal to the least common multiple;

4. For two or more scores, divide them separately, and then add and subtract them to get the final result.