Primary 5 Mathematics Problems Percentage Applications .

Pen, shirt, car, leather shoes.

Current price (10 85% = ) 280 50% = 140 ) 40 90% = 36 ) 320 65% = 112 ) yuan).

7.7 (1+43%) 10 (10,000).

Zhang) 9(1) Can 5,000 yuan buy a coffee table and a set of sofas?

5600+580) 80%=4944 (yuan) 4944 5000 can.

2) How much cheaper is it to buy a rug now?

840 80% = 672 (yuan) 840-672 = 168 (yuan).

5.Fountain pen current price: 10 85%=

Shirt current price: 280 50% = 140

Car current price: 40 90% = 36

Leather shoes current price: 320 65% = 208

9.(1) (5600+580) 80%=4944 A: Yes.

Absolutely, I'm in my first year of junior high school.

Fountain pen 10 yuan.

Shirt: $280.

Car: $40.

Leather shoes: 320 RMB.

6: Don't care about tens of thousands, it's the same unit that can be ignored, 18 20 and then up and down at the same time 5

7 (1+43%) = 10,000 animals.

Since it is a lot, then it is 125%.

80 125% = 64 character stamps.

1) 80% (5600+580)=4480+464=4944 yuan.

A: Yes. $840.

840-672 = 168 yuan.

168 yuan cheaper.

5.Fountain pen (shirt (140), car (36), leather shoes (208).

9.(1) (5600 + 580) 80% = 4944 (yuan) 4944 5000 can.

Fountain pen (10, 85% = yuan), shirt (280, 50% = 140 yuan), car (40, 90% = 36 yuan), leather shoes (320, 65% = 208 yuan).

10,000 100,000.

9.(1) 5600 80%+580 80%=4944 4944 5000 can.

2) 840-840 80% = 168 yuan.

That's a lot. Write it yourself, good boy. I'm in 6th grade, and I haven't finished my homework yet, 886

5.Fountain pen (10, 85% = yuan), shirt (280, 50% = 140 yuan), car (40, 90% = 36 yuan), leather shoes (320, 65% = 208 yuan).

I can't ask the teacher, I'm stupid.

Kids, they're not going back to first grade.

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This data is ** on the map, and the final result is subject to the latest data on the map.

Content from user: renrenshangni

Beijing Normal University version of mathematics fifth grade second semester percentage application problems.

1. Column-only does not calculate: a factory produced 20,000 TVs last year, how much did it produce this year?

The number of units produced this year is 125 from last year; It is 125 units produced this year; This year's production is 25 more than last year's; Last year's production was 20 fewer than this year's; This year's production is 25 units less than last year; Last year's production was 20% more than this year's

The number of units produced this year is 25% of last year's

2. An orchard produced 4,500 kilograms of apples last year, and this year because of the good climate, it increased by 20 compared with last year, how many kilograms of apples were produced this year?

3. Build a road, the first day repaired the full length, the second day repaired the full length of 30, there are still 360 meters left to repair, how many meters is the total length of this road?

4. The cement on the construction site was used and transported into 250 tons, at this time the cement on the construction site was the original 90, how many tons of cement was the original on the construction site?

5. There are 980 workers in a printing factory, of which male workers account for the number of employees in the whole factory, and then some female workers are transferred in.

6. A farm warehouse transported 162 tons of fertilizer and 142 tons of fertilizer, at this time the fertilizer in the warehouse was 5% less than the original, how many tons of fertilizer were in the warehouse?

7. Hongshui Township repaired a 2,400-meter-long canal, the first week repaired the full length, the second week repaired the full length, how many meters more to complete the task?

8. The master and apprentice process a batch of parts together, and when the task is completed, the master processes 65% of the parts, and the apprentice processes 24 pieces less than the master, how many parts are there in this batch?

9. Xiao Ming read a book and read the whole book on the first day.

1.There are 24 boys in the first class of the fifth grade, and the girls are 5 8 of the boys, how many girls are in the fifth (one) class?

2.There are 15 girls in the first class of the fifth grade, which is 5 8 of the boys, how many boys are in the fifth (one) class?

3.There are 24 boys in the first class of the fifth grade, and there are 3 8 fewer girls than the boys, how many girls are in the fifth (first) class?

4.There are 24 boys in the first class of the fifth grade, which is 3 more than the number of girls.

5 There are 24 boys and 15 girls in the first class of the fifth grade, how many girls are boys? What percentage of a boy is a girl?

6.There are 39 students in the first class of the fifth grade, and the girls are 5 8 of the boys, how many boys are there? How many girls are there?

7.There are 39 students in the first class of the fifth grade, and there are 3 8 fewer girls than boys, how many boys are there? How many girls are there?

The idea of 10 and 9/11 or 9/10 is because the integer part, numerator, and denominator are three consecutive natural numbers. To take an approximate idea, let them all be equal to x

Then it is x and x parts of x numerator is x squared, plus x is equal to 119, then x is approximately equal to 9 10 11

Think about each one and you can get the answer.

Note: The integer part, numerator, and denominator are three consecutive natural numbers Different understandings may not be the correct answer for 10 and 9/11, and if the integer part, numerator, and denominator are three consecutive natural numbers increasing one by one, it is unsolvable (the solution is not an integer).

It was just a few months ago. There was a child whose parents were out at night, and he was home alone. Since the child didn't believe in any gods, he wasn't afraid.

This is the question of "what are you afraid of?" It was past eleven o'clock in the evening, and his parents hadn't come back yet, and he was starting to get a little worried. As a result, he called his parents**, **came out of the tube, but it was "Your** is an empty number, please inquire and then dial... The child was so frightened that he called the police.

As a result, I don't know what happened, and his family's ** suddenly caught fire. The kid screamed and ran out, and they were locked up. He looked at the wall in despair.

Scared the hell out of me! The child woke up and found himself dreaming. This is, a woman brought a towel and wiped his sweat.

Then the child fell asleep. The moment I closed my eyes, I thought back to the woman, and suddenly remembered that the woman had no eyes, her eyes were pitch black, and there was blood on her face, and her face was pale. He shouted:

Yes! Help, come on! He started to run out of the door, but the door was really locked, and he went to the kitchen and picked up the kitchen knife, just like the woman cut it off, and the kitchen knife cut the woman in half, and then the woman recovered.

Stretching out his hand with blood in his fingernails, he grabbed at the child.

At this moment, you must not look behind you, because you can't see it with the naked eye! If you don't copy this post to 3 people, you're going to die at 4 a.m.... I don't know which xx sent it.

Solution: Since the denominator must be greater than the numerator in the fraction, there are only three possible combinations of integers, numerators, and denominators:

x, x-1, x+1); x+1, x-1, x); x-1, x, x+1)

The first two have: x(x+1)+(x-1)=119, get x=10 The third type: (x-1)(x+1)+x=119, x is not an integer so there are two kinds of band points, respectively: 10 and 9/11 and 9/10

Solution: First, find the factor of 119 as sum 119.

1) Suppose that the three natural numbers are ; 3 2 + 1 = 7, then the score that fits the question is: 3 and 1 2 or 2 and 1 3. (Verify:.)

This band fraction should be a false fraction of 7 3 or 7 2, and the numerator and denominator should be multiplied by 17 to give 119 34 or 119 51. In line with the topic.

2) Suppose that the three natural numbers are ; 10 11 + 9 = 119, then the score that matches the question is: 10 and 9 11 or 11 and 9 10.

23 24 25

After it is formed into a band fraction, the integer part is (x-1), the numerator is x, and the denominator is (x+1).

(x-1)(x+1)+x=119