5. Math Problems Basic Simple Math Problems in Grade 5 Simple .

Let me come to the first question, in fact, there is a pattern, as long as you turn the number of 1 point into a fraction, you will find the pattern, for example: it is three-thirds of two, that is, seven-sixths, that is, eight-points only nine, that is, eleven-tenths, understand? There are countless such formulas, such as:

5+21+, etc.

Question 2: Set Wang Ming scored X points.

85*11+x)/12=

The solution is x=91

Question 3: Three small triangles are equal in base and height, so the area is equal.

Answer: The areas of the three small triangles are: (18) (18) (18).

a+x=ax a= make it yourself.

a=5 x= 5+ swap can also be a= x=5a= x=11 swap can also be a=11 x=a= x=3

a=6 x= 6+

a=9 x= 9+

2. x-(85*11+x) 12= Wang Ming scored 91 points.

3=18 The bottom edge of the three triangles is 5cm, and the height is the distance from the right-angled point of the large triangle to the hypotenuse.

Question 1: No.

Question 2: Set Wang Ming scored X points.

x-(85*11+x)/12=

x-(935+x)/12=

Multiply both sides by 12 at the same time to get: 12x-(935+x)=6612x-935-x=66

11x=1001

x=91A: Wang Ming scored 91 points.

Question 3: Three small triangles are equal in base and height, so the area is equal.

Answer: The areas of the three small triangles are: (18) (18) (18).

The first question, this. To have one’s hands tied.

In the second question, let Wang Mingchuan score x, then there is, (85*11+x) 12=x+, and solve x

In the third question, the bases and sides of the three triangles are equal, so 54 3=18

876060309, hello:

1) When Xiao Ming calculates a decimal division, he treats the divisor as if the result quotient is 3 greater than the correct value. Do you know the correct result for this question?

The divisor is: (Correct result:

2) (Solve with equations) A and B are kilometers apart, and passenger cars and trucks drive out of A and B at the same time, and meet after hours. It is known that the average passenger car travels 65 kilometers per hour, how many kilometers does a truck travel on average per hour?

Solution: Set up trucks to travel an average of x kilometers per hour.

x＋65＝x＝115－65

x＝50

Compare sizes:

21 24 is 7 8

Greater than 28 36, 15 18, multiply the numerator and denominator by 2 to get 30 36336 39 is greater than 4 5

Less than 59 60 , 29 30 The numerator and denominator are multiplied by 2 to get 58 60

Write common multiples. Write at least three: common multiples are generally the smallest, right?

Common multiples of 8 and 16: The least common multiple is 16

Common multiple of 3 and none: is it 5? The least common multiple is 15

Common multiples of 18 and 24: The least common multiple is 72

Calculate that two-thirds plus one-half equals seven-sixths, or one-sixths three-quarters plus two-thirds equals seventeenths of twelve, or five-fifths of one-twelfth four-fourths equals thirty-one tenths of twentieths, or one-twentieths eleven-sixths of five-fifths plus four-fifths equals forty-nineties of thirty-nine, or one-thirty-nineteenths two-thirds minus one-half equals one-sixth.

Three-quarters minus two-thirds equals one-twelve.

Four-fifths minus three-quarters equals one-twentieth.

Five sixths minus four fifths equals one-thirtieth.

A day of light rain.

It takes one-third of the whole day for studying, one-eighth of the whole day for cultural and sports activities, and one-twelfth for watching television.

I spent one-twelfth of my meals and three-eighths of my sleep.

1.Less than studying more time a day or sleeping?

One-third is less than three-eighths, so there is more time to sleep.

2.How much more cultural and sports activities than watching TV?

One eighth minus one twelfth equals one twenty-four.

3.How much more sleep than eating?

Three-eighths minus one-twelfth equals seven-fourths.

Less than Less than Less than Less than (didn't understand what you mean) 16 32 64

5 yes) 15 45 90

7/6 17/12 31/20 49/6 1/12 1/20 1/30 9 1 7

Thinking Training under Grade 5 Mathematics 4

2. The numerator of a simplest fraction is expanded by 4 times, and the denominator is reduced by 3 times to obtain 10, then this simplest fraction is ( ).

3. There are ( ) divisors of 360, and the sum of these divisors is ( ).

4. A mathematics test, the average score of the whole class in May 1st class is 91 points, the average score of boys is 89 points, and the average score of girls is 24 in this class, and there are 24 boys ( ) people, 5. Guangming Bookstore sells a total of 120 books A and B, 5 yuan per book of A and B books.

6. There is a class of students who go rowing, they calculated, if one boat is added, exactly 6 people will sit in each boat, and if one boat is reduced, there will be 9 people in each boat, and there will be a total of ( ) students in this class.

7. Fill in the numbers according to the rules, (

8. A natural number is divided by 3 by 1, 5 by 2, 7 by 3, and 7 by 3, the smallest of this natural number is ( ).

9. If it is known that May 1, 2005 is a Sunday, then October 1 of this year is a week ( ).

10. The length and width of the rectangle are prime numbers, and the circumference is 36 cm, so the area of the rectangle is the largest.

Cm. 11. Xiao Ming walks from home to school, if he walks 60 meters per minute, then he will be 5 minutes late, if he walks 90 meters per minute, then he can be 4 minutes in advance, and the distance from Xiao Ming's home to school is ( ) meters?

12. Xiao Ming has a movie ticket with 10 to 40 rows, the maximum common divisor of the number of rows and seats of this ticket is 13, and the least common multiple is 72.

13. A rectangular timber with a square cross-section, with a surface area of 118 square centimeters, has a surface area of 54 square centimeters after sawing off a maximum cube, and the surface area of the cubic timber sawed is ( ) square centimeters.

15 meters).

5:30-14:00 = 1:30 = hour.

15 divided by kilometers).

25÷20 （25-20）÷25 （25-20）÷20 20÷（20+25） 25÷(25-20)

Question 2: I don't know if you have turned the circular decimal into a percentage and turned it into the third place.

1，20/25，25/20，（25-20）/25，（25-20）/20，20/（25+20），25/（20+25）

2，，7=700/100，2/3=67/100，。1 100, 6 7 = 86 100, 2 and 5 9 = 267 100

3,,150 100=,300 100=3,,,4,420*(1+20 100)+420,10 (1-99 100), (20-5) (1-25 100-25 100) 20-5 kg left with 25 100 for the second time.

1. A a B B, A except B

b divided by a difference of two numbers divided by b

The difference between the two numbers is divided by aa and divided by the sum of two numbers.

b divided by the sum of two numbers.

1. Calculation questions. (3 points per question, 15 points in total).

2. Multiple choice questions. (3 points per question, 18 points in total).

1 Which of the "0s" at the end of each of the following numbers can be removed? （

What can't be removed? （

2 The sum of those with is much worse than theirs ( ).

3 In the following questions, the quotient with the largest quotient is ( ) and the quotient with the smallest quotient is ( ).

4.In the following equations, the number less than 1 is ( ).

3. Solve the equation. (4 marks per question, 20 marks in total).

6x-3x=

3a-a=18÷

x 4 Fill in the following numbers as required. (16 points in total).

Multiples of 2:5:

Multiples of 3: both multiples of 2 and multiples of 3 and 5:

5. Fill-in-the-blank questions. (2 points per space, 20 points in total).

1 The full factor of 24:

2 Common Factor of 18 and 21:

3 The greatest common factor of 8 and 12:

4 Multiples of 3 within 20:

5 Prime numbers within 10:

6 Composite numbers within 10:

7 A number that is both composite and even is:

8 Triangles have sex.

9 odd + odd =

10 Numbers like this are natural.

6. Problem solving. (11 points in total).

1 If you want to buy 100 kilograms of soybean oil in the school canteen, each bottle can hold a maximum of kilograms of oil, how many such bottles do you need to bring to buy oil? (3 points).

2 When 1,500 kilograms of apples are removed from the orchard, four times as many peaches are taken away as apples, how many peaches and apples are taken away? (3 points).

3 Stationery stores buy some English books at wholesale prices, per dollar, and retail prices per dollar. When I sold 20 English books, I calculated the money from the sale, and made a profit of 40 yuan after deducting the cost. How much do you buy English books at stationery stores? (Solved with equations, 5 points).

The third digit indicates the city-level postal district (return prefecture-level city).

The fourth place represents the district-level postal district of Tushino County.

The fifth and sixth digits indicate township-level postal districts.

A total gram represents 10*10*10*10=10,000 postal areas.

However, in practice, it is not fully used, for example, it is impossible for a county-level city to have 100 townships in its administrative division.

If two girls are born on the same day in the same police area, the number is (in our case) and you may be like this, but it must be even.

Mail it. 2. You haven't finished writing the topic.

Think for yourself, don't always want to ask others!!

The volume of a bottle of mineral water is about 500 (cm) and the volume of the car fuel tank is about 120 (l).

A small vial has a volume of about 10 (ml) and a classroom covers an area of about 70 (m).

2. To make a rectangular frame with a length of 15 cm, a width of 10 cm and a height of 8 cm, you need at least iron wire (132cm), and paste a layer of paper outside this frame, at least (700cm) of paper is needed, and the volume of this carton is (1200cm).

3. The volume of the cuboid is 120m, the length is 5m, the width is 4m, and the height is (6m).

4. The edge length of the cube is expanded by 2 times, the surface area is expanded by (4) times, and the volume is expanded by (8) times.

5. Use a small cube with an edge length of 1 decimeter to assemble a cuboid with a length of 5 decimeters, a width of 4 decimeters, and a height of 2 decimeters, and a total of such small cubes (40) blocks are needed.

6. The surface area of a cube is 24 square decimeters, and its volume is (8) cubic decimeters.

7. There are 3 liters of a certain potion, which should be divided into 2 ml per bottle, and a total of (1500) bottles can be divided.

8. The sum of the edge lengths of a cube is 96 decimeters, and the surface area of this cube is (384dm).

9. A rectangular fuel tank, 6 decimeters long, 2 decimeters wide, 2 times the width of the high, after loading 30 liters of oil, the height of the oil is (.

10. Cut a cube with an edge length of 8 decimeters into two cuboids of the same size. The volume of each box is (256dm) and the surface area is (128dm).

True/False: 1. The surface area of two cuboids with equal volume is also equal. （×

A milliliter is equal to 500 cubic decimeters. （×

3. The edge length of the cube is expanded by 3 times, and the volume is expanded by 9 times. （×

4. Assemble two cubes into a cuboid with the same volume and surface area. （×

5. At least 8 small cubes of the same type are required to form a large cube. （√

6. If the base area of the two cubes is equal, the volume is equal. （√