1. There are apple trees and pear trees in the orchard. It is known that 72 pear trees are less than 2/3 of the total number, and 20 are more than 3/5 of the total number. How many pear and apple trees are there? Solution: Let the total tree be X, then the pear tree 2x/3-72, the apple tree 3x/5+202x/3-72+3x/5+20 = x4x/15 = 52x =195 pear tree 2x/3-72 = 2 * 65438. The first pile weighs 3.4 tons, 0.2 tons more than the second pile. How many tons do two piles of coal weigh? Solution: The second reactor: (3.4-0.2)/(4/5)=4 tons. Two piles of ***4+3.4=7.4 tons. 3. A middle school has built 650,000 new staff dormitories, less than the original plan 1/6. How much did the original plan cost? Solution: The original planned expenditure is: 65/(1-1/6) = 780,000 yuan. 4. A flagpole, the ground part is 5/7 of the total length, and the part inserted into the soil is 2 meters long. What is the total length of the flagpole? Solution: The total length of flagpole is 2/( 1-5/7) = 7.5. A wire, using 3/4, has 42 meters left. How long is this wire? Solution: The original length of this line is: 42/( 1-3/4) = 168m 6. A canteen used 4.5 tons of coal in May, less than that in April 1/6. How many tons of coal was used in this canteen in April? Solution: The coal consumption of this canteen in April is: 4.5/(1-kloc-0//6) = 5.4 tons. 7. Take a long-distance bus, the first hour 1/3, the second hour 1/6, two hours * *. Solution: The distance from the urban area to the scenic spot is 39/(1/3+1/6) = 78 km. 8. A number of saplings were planted, 246 for the first time and 354 for the second time, leaving 5/8. What is the total number of saplings? Solution: The total number of these saplings is: (246+354)/(1-5/8) =1600, which is unclear. Welcome to ask and adopt ~ thank you!