Grade 5 Math Problems High Score Help, 5th Grade Math Problems

1. Analysis: No cover means that there are only 5 sides.

Solution: 6 6 5 = 180 (square decimeter).

A: At least 180 square decimeters of iron sheet are required.

2. Analysis: It is to find a base area + side area.

Solution: 50 40 + (50 + 40) 2 35 = 8300 (square centimeter) or: 50 40 + (40 35 + 35 50) 2 = 8300 (square centimeter).

A: The area that needs to be painted is 8300 square centimeters.

3. Analysis: how many faces are exposed on the outside; Or calculate the surface area of all the cubes and subtract the area blocked by the three walls.

4. Analysis: The same principle as the second question.

Solution: 12 8 + (12 + 8) 2 4 = 256 (square meters) square meters).

kilograms) A: A total of kilograms of lime are required.

*6*5=180 square decimeters.

40 + (50 + 40) * 2 * 35 = 8300 square centimeters.

20*3=1200 square centimeters.

4. [12*8+(12+8)*2*kg.]

x6x5 = 180 square decimeters without a lid only need to be multiplied by the area of 5 faces.

2. (50x35 + 40x35) x2 + 50x40 = 8300 square centimeters The ground is not painted, and it is not multiplied by 2

x20x3 = 1200 square centimeters against the corner of the wall, there are only three sides, so multiply by 3.

4. [(12x4+4x8)x2+ kg The total area is minus the area of doors and windows, and then multiplied by the material per square meter.

I hate math and I hate it since I was a child.

The volume of the stone is equal to the volume of water rising.

3 centimeters = decimeters.

cubic decimeters).

An engineering team is divided into two groups to dig a tunnel from both ends to the middle, the first team of 19 people, a total of 3 days to dig a total of rice, the second team of 25 people, 3 days to dig a total of rice, according to this progress of a total length of 560 meters of tunnel, about a few days to complete?

For the purpose of the agricultural tools factory originally manufactured a farm tool with steel tons, after technological innovation to manufacture a farm tool can save steel tons, the original manufacture of 240 too farm tools of steel, how many units can be manufactured now?

A train travels 216 km in 4 hours and 30 minutes. After 9 hours of driving, we were still a kilometer away from our destination. How many kilometers is the full journey of this train?

Last year, a hosiery factory produced an average of 10,000 pairs of men's socks and 10,000 pairs of women's socks every month. The output of this year's 8 months is more than 10,000 pairs of the total output of the town's quiet year, and the average monthly output of socks in the 8 months of this year is how many 10,000 pairs?

Two cars, A and B, travel in the opposite direction from two places that are kilometers apart, and car B travels kilometers per hour, driving for 1 hour first, and then car A drives out in kilometers per hour; How many hours do you want to meet?

A lighting factory manufactures a batch of lamps and lanterns, plans to manufacture 260 pieces per day, and completes it in 30 days, but the result is actually 5 days less than planned, how many pieces are actually manufactured in the coal field?

1 5 7 5 7 tons. This is the specific tonnage, and the total tonnage is divided by the number of portions, and the words "these fertilizers" and "full length" can be regarded as unit 1

What percentage of these fertilizers do each village get? That is to say, these fertilizers are whole, unit 1, that is, 1 is divided into 7 equal parts. So with 1 7 1 7

Note: The previous question is to ask the specific tonnage, and the unit should be brought. The latter question is to ask a few points, and you can't bring a unit.

2 17 + 23 + 9 = 49 people.

3 5-meter-long ropes are divided into 8 equal parts. The length of each serving is a fraction of the total length. The full length is the unit 1Divide into 8 portions equally. So 1 8 1 8

How many meters is each portion long?

There are unit meters after the question. So it's just asking for the specific length. With a concrete total length of 5 meters 8 5 8 meters. Remember to bring units.

4 Fold a 1-meter rope in half twice, which is a fraction of the total length of each piece of rope. Fold it and see that it's four paragraphs.

The same, the unit is 1 4 1 4

How many meters is each length of rope? Concrete 1 meter 4 1 4 meters.

This kind of question is mainly based on the problem. The question is followed by a unit, or the question is how many are how long they are, and the specific question is divided by the specific total.

If you ask how many fractions are, divide the unit one by the number of copies.

1. 5/7=

Tons of fertilizer per village? Each village receives one-seventh of this fertilizer.

Excellent 17 49 Good 23 49 Fair 9 493, 5 8=

The length of each portion is 5/8 of the total length, and the length of each portion is 5/8 of the meter.

This is 1/4 of the total length of each section of rope, and each section of rope is 1/4 of a meter long.

1.Each village was given 5 7 tons of fertilizer 1 7

2.Excellent 17 (17+23+9)=17 49 Good 23 49 Average 9 49

3 per serving is 1 8 each serving is 5 8 meters long.

4 Each section accounts for 1 4 The length of each section is 1 4 meters.

Question 1: The first question is 5 7 = 5 7 (tons) The second question: 1 7 = 1 7 Because the first question asks for the quantity, it is to divide 5 tons into 7 parts equally, and the second question asks for the number of parts, to regard 5 tons as a unit 1, and divide 1 into 7 parts equally.

Question 2: First find the total number of people 17 + 23 + 9 = 49 (people) 17 49 = 17 49 23 49 = 23 49 9 49 = 9 49

Three questions: 1 8 = 1 8 5 8 = 5 8 (m) The same question is the same.

Four questions: 1 4 = 1 4 1 4 = 1 4 (m).

5 divided by 7 = tons) equals five out of seven.

17 + 23 + 9 = 49 (person) 17 divided by 49 = seventeen forty-nine 23 divided by 49 = twenty-three forty-nine 9 divided by 49 = nine-nine-fourth.

5 divided by 8 = five eighths (meters).

1 divided by 2 = one-half of the length of each length of rope is one-half of a meter.

Generally 5 7 tons per village of 1 7 excellent 17 good 23 49 generally 9 49 per cent of the total length of each cent 5 8 per cent of the total length of 1 4 4 per section of the total length of 1 4 per section of 1 4 per section of the length of 1 4 meters per section of the total length of 1 4 meters per section of the total length of each section of the total length of 1 4 meters.

Each village receives five-sevenths of a tonne and each village receives one-seventh of the fertilizer.

Seventeen out of forty-nine are excellent, twenty-three out of nineteen are good, and nine out of forty-nine are average.

Each portion is one-eighth of the total length, and each portion is five-eighths of a meter long.

Each section of rope occupies a quarter of the total length, and each section of rope is a quarter of a meter long.

1.Divide the number directly by the total number, [5 7 tons] 1 number, [each village divides the total to 1 7].

2.Divide the number of students in each grade by the class size, 17 49 23 49 9 49

number, [1 8], 5 8 meters].

4.You can try it with a note [1 4] [1 4 meters].

1. 5/7。

2.Excellent: 17 class size; Good: 9 class size; General: 3 class sizes.

3.Each portion accounts for 5 8 of the total length; Each serving is 5 8 meters long.

4.(1 2 * 1 2 = 1 4) Each length of rope accounts for 1 4 ; Each section of rope is 1 4 meters long.

It is the study of fractions, it is recommended to study the example questions in the book, good luck.

Aunt Shewang played for x minutes.

20+x=500/3

x=166 and 1 3

Aunt Wang played 166 minutes and 20 seconds.

Aunt Shewang played for x minutes.

Category 1: 20+

The second category: 20+ solution x=500 3

70*5*3 or 50*7*3 or 30*7*5 10*20*20

15 divided by 3/4

20*3/5

Language 30*1/5

Number 30*1/6

Tone 30*1/15

Body 30*1/10

The answer is your own.

1 .7*3*10*2+7*5*10*2+3*5*2=1150 At least 1150 plastic paper with an area of 1150 is required.

2.20*20*2+10*20*2+10*20*2=1600 The surface area of each box is 1600

Xiaofang has 20 stamps.

Xiaoli has 12 stamps.

6 Chinese classes per week, 5 math classes per week, ** classes 2 times per week, and 3 physical education classes per week;

①（7×10+7×10+3×5）×2=310②20*20*2+10*20*2+10*20*2=1600③15÷3/4=20

Language 30 * 1 5 = 6

Number 30*1 6=5

Tone 30*1 15=2

Body 30*1 10=3

Hope it helps

1.(7*5+7*3+5*3)*2*10=1420 square centimeters1420-3*5*(10-1)=1285 square centimeters1420-3*7*(10-1)=1231 square centimeters1420-5*7*(10-1)=1105 square centimetersAnswer: It may take 1285 square centimeters, it may take 1231 square centimeters, it may need 1105 square centimeters.

Cm. 2400 2 + 20 * 20 * 2 = 2000 square centimeters Answer: The surface area of each cuboid is 2000 square centimeters.

20 sheets 5 * 3 = 12 sheets.

A: Xiaofang has 20 stamps and Xiaoli has 12 stamps.

4.A: 6 Chinese classes, 5 math classes, 2 ** classes, and 3 physical education classes.

7 people can report multiples of 8.

Because 8 7 = 1 ......1，16÷7=2……2，……If the cycle goes on like this, it doesn't increase the multiple of 8, but the next person will report it, so everyone can take turns.

All 7 people report multiples of eight, because 8 7 is more than one, and so on.

Because 7 -1 (mod8).

So all of them can be turned to.

All children can report multiples of 8. 7 people are not divisible by 8 and the remaining 1 is exactly the same cycle.

1. In order to welcome the "May Day" International Labor Day, the worker's uncle should install colorful lanterns around the workers' club (the four sides of the ground are not installed). Known that the length of the workers' club is 90m, the width is 55m, and the height is 20m, how long does the worker's uncle need at least the lantern line?

x4+（90+20）x2

440 (m).

A: Uncle Worker needs at least 440 meters of lantern line.

2. The commissary should make a glass counter with a length, width of 40cm and a height of 80cm, and now it is necessary to install angle iron on all sides of the counter, how many meters of angle iron does this counter need?

40cm=80cm=

= m) A: This counter needs m. of angle iron.

3. How many cubic meters of soil should be dug out of a rectangular soil pit with a length of 50m, a width of 30m and a depth (height) of 50 "cm" at the construction site?

50cm = 750 (cubic meters).

A: 750 cubic meters of soil were excavated.

4. What is the volume of a cube of ice with a 30cm edge?

30x30x30

900x30

27000 (cubic centimeters).

A: Its volume is 27,000 cubic centimeters.

5. The birthday cake that my mother gave to my grandmother is 2dm long, 2dm wide and high, and my grandmother divides it into 4 small cuboidal cakes equally

xx== cubic decimeter).

A: Each person will be given a cake with cubic decimeters.