1, solution: green flower has100 (1-7/20) =100x13/20 = 65 flowers 2, solution: green flower has100x7. 5. Solution: Green vegetables have 12( 1-3/8)=7.5 tons, so it is less than Chinese cabbage 12-7.5 tons. So the weight of citrus is 75x2/5 = 30kg. 7. Solution: afternoon road construction 120x3/4 = 90m, all-day road construction 120+90 = 2 10m. 8. Solution: I have read this book for two days 4/ 15+65438+. Two days * * * I read 150x3/5=90 pages. 9. Solution: Sister's weight is 65x6/ 13=30 kg. The reason why the first question of the eighth question is addition is because. For example, a 100 page book. You read five pages on the first day, and that's 1/20. I read five pages the next day, and it was still 1/20, so I read 10 in two days, which is1/20+110. Multiplication is meaningless. If you don't understand, you can draw lines by yourself. I will understand. Please keep asking questions! If you are satisfied, thank you for your adoption.