Current location - Training Enrollment Network - Mathematics courses - Last year's math national primary school students' ability competition. . Sixth grade. . It is the foundation. . Come and have a look. . Column formula. . Tell me the secret again. .
Last year's math national primary school students' ability competition. . Sixth grade. . It is the foundation. . Come and have a look. . Column formula. . Tell me the secret again. .
( 1)39/6 1.

Because the sum of the numerator and denominator of the new score is 155( 100+23+32), and the ratio of numerator and denominator is 2: 3, so multiply 155 by 2/5 to get a new numerator, and multiply 155 by 3/5 to get a new denominator, and then subtract 20 respectively.

(2) Is the topic wrong or missing? The new fare is 12 yuan.

(3)23/ 16 means multiplying the duration of 23/ 12 hours by the speed.