10, use a bundle of 96m cloth to make clothes for the students in Class 1, Grade 6, 15 use 33m cloth. According to this calculation, which class is the most suitable for these fabrics to make school uniforms? (1 class 42, class 2 43, class 3 45)

Give person a 96 meters.

According to the meaning of the question

96:a=33: 15

33a=96× 15

A about 43.6

So it is suitable for Class 2, with a surplus, but not much. It is not enough to do it for Class Three.

1 1, a fraction. If the numerator adds 123 and the denominator subtracts 163, the new fraction is 3/4; If the numerator adds 73 and the denominator adds 37, then the new score is reduced to 1/2, and the original score is found.

Solution: Add 123 to the original fractional numerator and subtract 163 from the denominator to get 3a/4a.

According to the meaning of the question

(3a- 123+73)/(4a+ 163+37)= 1/2

6a- 100=4a+200

2a=300

a= 150

Then the original score = (3×150-123)/(4×150+163) = 327/763.

for reference only