Current location - Training Enrollment Network - Mathematics courses - How to solve the math problem about the meaning and nature of the fifth grade score in primary school?
How to solve the math problem about the meaning and nature of the fifth grade score in primary school?
The result is11in 36;

The analysis result is: make 4/9 of the first result and 2/3 of the latter result have the same denominator. The denominator of 4/9 and the denominator of 2/3 were originally 9, but they needed numerators, so they could only find 36 as the denominator. Then 4 of 9 becomes 16 of 36, because the result is obtained by adding 5 to the numerator, so it is good to subtract 5 from the result, because addition and subtraction can only be done if the denominator is the same, so it should be 16 of 36 minus 5 of 36 to get the original score 1 1.

Similarly, the two-thirds change is 24 of 36 minus 13 of 36, and the result is 1 1 of the original score of 36.

4*4 16 5 1 1

—— = —— - —— = ——

9*4 36 36 36

2* 12 24 13 1 1

—— = —— - —— = ——

3* 12 36 36 36

The two conclusions are that the original score is 36 points of 1 1.