Who helped me with 65 Primary 6 math application problems

Take 10 times So 10 times can be shipped V A = v B =

v B - v A =

The volume of the B cylinder is large and large cubic centimeters.

1. Cubic centimeters, S bottom = four times (square) = 16 factions, v = 16 factions (10-8) + factions +

cm=, v=2512 + (100 pies multiplied by 2) = 2512 + 200 pies 3, v = 25 pies multiplied by (30-25) + (25 pies multiplied by 15) = 500 pies 4, multiplied by 2 4=, then about 10 times.

5. a middle school; 2 times times, r = 3, v = 9 times multiplied by 12 = 108 in the second place; In the same way, r=4, v=16 multiplied by 1, 3 times 12=64, so A is large, and 108-64 = 64.

Good thing I remember something from elementary school!

Assuming that the blackboard is reported to be 12 copies and completed in 6 days, it means that the number of copies completed by 2 people per day is 2 copies; After Xiaobing did 2 days, Xiaohua did 1 day, and the two of them did a total of 3 days and completed 4/4 (that is, 1 4 * 12 = 3 copies), that is, 3 copies, it can be guessed that their efficiency is 1, so 12 copies of the blackboard newspaper, Xiao Bing or Xiao Hua did it alone (1 * 12 = 12 days).

Let the speed be v, and the total distance is s: 30v+20(v+50)+2000=s Continue to derive : 30v is equivalent to s 2 can be replaced by substitution, and then the formula is :

s 2 + 20v + 1000 + 2000 = s continue : 20v = s 2-1000-2000 finished: 20v = s 2-3000 replace 30v with :

20v=30v-3000 solution 10v=3000 v=300 Substituting the obtained velocity into the original equation can get 30*300+20*(300+50)+2000=s=18000

The result of 520*20 is how many TVs there are (10400), and then divide the total number of TVs by (520+130) The column formula can be written as: 10400 (520+130)=16 days.

1.After the creep did it for 2 days, Xiaohua did it for another day, which can be seen as working together for 1 day, and the creep sat on his own for another day So the efficiency of the creep: 1 4-1 6=1 12 The efficiency of the two-person cooperation:

1 6 So Xiaohua efficiency: 1 6-1 12=1 12 So it takes 12 days.

2, (20 50 2000) 30 20) 300 (m) 300 30 (300 50) 20 2000 18000 (m) 3520 20 = 10,400 units, 520 130 = 650 units, 10,400 650 = days.

1 will not 2 is...

3 is a total of 520 20 = 10400 units, the actual daily production of 520 + 130 = 650 units, it takes 10400 650 = days to complete the task.

3 520 20 = 10,400 units 520 130 = 650 units 10,400 650 = days.

2 20 50 2000 ] 30-20] = 300 m 300 30 [300 50] 20 2000 = 1800 m.

1 1/4 - 1/6 = 1/12 1/6 - 1/12 = 1/12 1 1/12 = 12 days.

It takes 8 days for A to cultivate alone, so A's efficiency is 1 8 per day B is 1 12 First Question: 1-(1 8+1 12)*3=3 8 Second Question: The remaining tasks are:

1-(1 8+1 12)*4=1 6 Because the rest is repaired by A, 1 6 1 8 = 4 3 days.

(1)3*(1/8+1/12)=5/8

2) The joint practice was dry for 4 days.

1-5 6 = 1 6 left

1 6) (1 8) = 4 3 days.

It will take 4-3 days.

1-（1/8+1/12）×3=3/8

A: 3 8 left

1 6) (1 8) = 4 3 days.

A: It will take 4 to 3 days to complete.

1.Xiaohong's family raised 4 boxes of Changwu bees last year, and collected a total of 380 kilograms of bees, compared with an average of 84 kilograms of honey per box the year before last. How many kilograms of honey per box was higher last year than the year before?

380 4-84 = 11 kg.

2.A professional poultry farmer raises 980 chickens, and the number of chickens raised by Xinxunhan is 20 times that of ducks. How many ducks are funny?

980-20) 2=480pcs.

3.A wire is erected from the county seat to Shengli Village, which is 7,200 meters long. After 3 days, it is still 2,400 meters away from Shengli Village. How many meters are erected per day on average? Working 10 hours a day, how many meters per hour is the average hour?

7200-2400) 3=1600 meters.

1600 10 = 160 m hours.