2. Read a book with 120 pages. I read two-fifths on the first day. How many pages are left? What page does the next day start from?

Remaining: 120- 120×2/5=72 pages;

The next day, from 120×2/5+ 1=49 pages.

3. Simple calculation

46× 1/47=46/47

4. The canteen brought 8/3 tons of Chinese cabbage, 9/00 of 65,438 cucumbers, and more radishes than cucumbers 1/6. How many tons more radish than cucumber?

Cucumber =8/3×9/ 10= 12/5 tons;

Radish is more than cucumber 12/5× 1/6=2/5 tons.

5. The side length ratio of two squares is 3:5. What is the ratio of their circumferences? (3:5 )

6. Three eighths of a bag of biscuits is 15kg. Give these to the big class and the small class at 5:3. How many cookies can you get in each class?

* * * cookie = 15÷3/8 = 40k g；

Large class = 40× 5/(5+3) = 25 kg; Small class = 40-25 =15 kg;

7. The male-female ratio of the school track and field team is 2:7, among which there are 35 more boys than girls. How many boys and girls are there in the track and field team?

Each copy =35÷(7-2)=7 people;

Boys = 7× 7 = 49; Girls = 7× 2 =14;

8. The distance from point A to point B is 78 kilometers. Two cars, A and B, set off from two places at the same time and met after 3/5 hours. The speed ratio between car A and car B is 2:3. How many kilometers does car A travel per hour?

Speed sum = 78 ÷ 3/5 =130km/h;

A car speed =130× 2/(2+3) = 52km/h;

B speed =130× 3/(2+3) = 78 km/h;

9. The sum of the three numbers A, B and C is 460, the ratio of A to the counted number is 3:2, and the ratio of B to C is 3:4. What are these three numbers?

a:B = 3:2 = 9:6；

b:C = 3:4 = 6:8；

So, A: B: C = 9: 6: 8.

a = 460×9/(9+6+8)= 180；

b = 460×6/(9+6+8)= 120；

C =460×8/(9+6+8)= 160