You can't grade the exam directly, you should write down the questions and grade them again. Multiplication means that if you can subtract points, you can subtract points first, denominator multiplied by denominator, and numerator multiplied by numerator. For example, 2/3 times 5/6, and 2 is a factor of 6, which can be deducted. At the same time, if you do about 2, it becomes 1 times 5/3. Then, the denominator is multiplied by the denominator and the numerator is multiplied by the numerator, which is equal to 5/9. Division means dividing by a number is equal to multiplying the reciprocal of this number. For example, if 2/3 is divided by 6/5, the reciprocal of 6/5 is 5/6. Now the formula is equal to 2/3 times 5/6, and then it becomes 1 times 5/3, and the final answer is 5/9. Remember that multiplication can be divided first, then the denominator multiplied by the denominator and the numerator multiplied by the numerator. Division is to divide a number by the reciprocal of this number and turn it into multiplication. Then you can first reduce the fraction, then multiply the denominator by the denominator and multiply the numerator by the numerator.

Hope to adopt!