Find a set of answers to the six math of elementary school

One degree.

Two. 3. 1, B, 15 days, A, 10 days.

When people heap (square centimeters).

Rice. The above answers are for reference, I wish you a happy study.

There are 267 students in the sixth grade of Heping No. 1 Elementary School, and the school organizes a math group, a recitation group, and a choir group, and stipulates that each person participates in at least one group and a maximum of two groups, so that at least a few people participate in the group exactly the same.

The publishing house is different, and the question is different.

What's the problem? Say it so I can give you the answer!

What kind of question is it? Say it, I'm good.

I only have 77 pages, sorry.

Hope it helps.

Do a do ) is a positive number.

3, -4, -2, -1) are negative numbers.

is a natural number. is an integer. 1. There are one bit, ten, hundred, thousand, thousand. Counting unit.

2. Look at the digits first, the number of digits is large. If the digits are the same, the comparison starts with the highest digit, and the higher digit is the larger.

3. The basic properties of fractions are; The numerator of the fraction is multiplied or divided by the same number (except 0) at the same time as the denominator, and the magnitude of the fraction does not change.

the basic nature of decimals; Add or remove zeros at the end of the decimals, and the decimal size remains the same.

4. Shift one place to the left and shrink by 10 times, move one place to the right and expand by 10 times, and so on.

5. The integer a can be divisible by the integer b, a is called a multiple of b, and b is called the factor of a.

An integer can be divisible by another integer, and that integer is a multiple of another integer. For example, 15 is divisible by 3 or 5, so 15 is a multiple of 3 and a multiple of 5.

Prime number: that is, in all integers greater than 1, except for 1 and itself, there is no other divisor, this kind of integer is called a prime number, and a prime number is also called a prime number.

Composite number: The divisor of a number has other divisors in addition to 1 and itself, and this number is called a composite number.

I think you should think for yourself, not search for answers.

The key difficulties in buying this book are answered later.

Why don't you do it yourself, it's not that you haven't learned, the teacher is giving you homework, but you come to the Internet to find it, so what's the point of the teacher letting you do the exercises! If you have this free time, you might as well do it yourself!

Of course, the whole math book is !!

Buy a textbook to get it all in. with a computer.

A pile of coal, originally planned to be four tons per day, can be burned for 150 days, after the improvement of the stove, the actual daily burning of tons, how many tons of this ton of coal can actually be burned?

There are 4 150 600 (tons) of coal

It can actually be burned.

600 days).

In a design drawing with a scale of 1:30,000, a section of road is 7 cm long, and now the distance of this road is allocated to two road repair teams A and B according to 4:3, how many meters does each team need?

The actual length of the road is.

7 1 30000 210000 (cm) 2100 (m).

Jiaxiu 2100 4 (4 3) 1200 (m).

B 2100 3 (4 3) 900 (m).

The distance from the school is kilometers, the distance between the school and home is kilometers, the distance from home to the bookstore is 3cm, and what is the distance from home to the bookstore?

Scale Distance on the map: Actual distance Cm: km Cm: 90,000 cm 1:60,000

The distance from home to the bookstore is.

3 1 60000 180000 (cm) 1800 (m) km).

The first question, you should have typed the wrong question, it should be asking: "How many days can this ton of coal actually be burned?" "Right?

Solution: If this ton of coal can actually burn x tons.

2 4x 150 times 4

x ＝ 250

A: This ton of coal can actually be burned for 250 days.

Question 2, 7 1: 30,000 = 210,000 (cm) = 2,100 (m) Solution: 3x meters are needed for road repair team A, and 4x meters are needed for road repair team B.

3x + 4x =2100

x=400 then the first road repair team needs 1200 meters, and the second road repair team needs 900 metersAnswer: A road repair team needs 1200 meters, and B road repair team needs 900 meters. Please change it.

Supplementary Questions, Question 1, x two-thirds.

Question 2, x 0 15

Question 3, x 3

1.The total amount of coal: 150*4=600 (t).

Actual can be burned: 600 days).

2.The total length of this section of the road: 7 * 30000 = 21000 (cm) = 210m A requirement: 210 7 * 4 = 120m

B needs: 210-120=90m

3.The distance from home to school is 3cm, so the actual distance from home to bookstore is twice as long as that from school.

Actual distance from home to bookstore:

Untie. 1.How many days is burned? 4*150 days.

Centimeter = 2100 meters, A can repair 2100 * 4 (3 + 4) = 1200 meters, B can repair 2100 * 3 (3 + 4) = 900 meters.

Solution x = km.

1.Solution: Suppose it can actually burn x days.

x=250A: 300*4=1200(m).

B: 300*3=900 (m).

Complement: 1: x=3 8

2:x=3:x=3

1. Solution: If this ton of coal can actually burn x tons.

x=250

Solution: Let this pile of coal actually burn x tons 4:150=:x

(1)150：x=：4

x=150*4 days).

2) A 30000 * 7 * 4 (4 + 3) = 120000 (cm) = 120 meters.

B 30000 * 7 * 3 (4 + 3) = 90000 (cm) = 900 meters (3) meters).

Indicates the division sign. x=1/4*1/2*3=3/8

x=x=

I'm just one portal wide open, but it's all codebreaker code, I can't enter it, ask for GBA code.

x=600/

x = 250 A: How many 250 tons of coal can actually be burned in this ton of coal.

Every 100 households in Guangming Village have 121 color TVs this year, an increase of 66 over last year.

121 66 55 (sets).

How many percent has it increased this year compared to last year?

Hongxing Village planned to afforestate 9 hectares last year, but the actual afforestation was 12 hectares, what percentage of the actual afforestation was the original plan?

How many percent more than originally planned?

The answer from the guy above is correct.

x/3+18=132,x=(132-18)*3=342.

x+18)/3=(342+18)/3=120

Divide a number by 3 and add 18 to the result to get 132:; If you add 18 to this number, divide the result by 3 to get (120).

A school held a table tennis competition, and 64 students participated in the singles competition. The competition adopts a single-elimination system, that is, two people play, the loser is eliminated, and there is only one champion, and a total of 63 matches are required.

a+b = 176, i.e. one of the numbers ends in 0. The other number ends with 6. The result is 68, which means that the ten digit at the end of 0 is 2. So there is a ten digit at the end of 6 that is 5So these two numbers are 56 and 120 respectively

The sum of two numbers is 176, Xiaohong omitted the "0" on the single digit when calculating this problem, and the sum calculated is 68, so the smaller of the two numbers is (56).

The top ** is A, the pants ** is B, the total price of the money is S, the remaining number of sets is, A=S 8,10B=S,B=S 10,I have bought a pair of pants, spend S 10,9S 10=(A+B)C=(S 8+S 10), equal to 4

Aunt Wang brought some money to buy clothes, she could buy 8 pieces of tops only, 10 pairs of pants only, and now she bought a pair of pants, and the rest of the money can be bought with 4 sets.

After the value is calculated in each parentheses, it is found that the denominator of the previous value and the numerator of the next value are the same, so that the denominator of the previous value and the numerator of the next value are approximated, and only the numerator of the first value and the denominator of the last value are left.

One-half) * (one - one-third) * (one - one-quarter) *One - one in two thousand and nine) * (one - one in two thousand and one-tenth) = one in two thousand and tenth.

Correct answer A question, answer wrong question B, score, A+B=24i.e. c = 120-8b

Minimum 8 points. 8 = 120-8b, b = 14, that is, the lowest score, 14 wrong, 10 right, because each person's score is different, so the highest score is up to 5 wrong, 19 right. The score is at least c=19*5-5*3=80

10 people participate in a quiz contest and each must answer 24 questions. 5 points for a correct answer, 3 points for a wrong answer, 8 points for the person with the lowest score, and each person's score is different, how many points is at least the first place? （80）

A to B time t A, B to A time t B. TB-TA=8 hours. The distance between A and B is s=20*tA=15*tB.

t B = 8 + t A. s=15*(8+tA)=20*tA, tA=24 s=20*24=480

A ship travels 20 km per hour downriver and 15 km per hour against the current. The time taken by the ship Cong A to port B was eight hours less than the time taken from port A to port A was eight hours less than the time taken from port B to port A. How many kilometers are A and B apart? (480)

(x/3)+18=132x=342

The number with the addition of the single digit missing 0 is (176-68) 10 9 = 120, then the other addition is 176-120 = 56

The lesser of the two numbers is 56

Method 1 32 + 16 + 8 + 4 + 2 + 1 = 63 Method 2 There is only one champion, and 64-1 people need to be eliminated, so 63 games.

After the sum, only the first and last terms remain, and the middle terms can be eliminated, e.g. 1-1 2+1 2-1 3+1 3....1/2007+1/2007-1/2008+1/2008-1/2009

Suppose a total of 80 yuan, so the top is 10 yuan a piece, the pants are 8 yuan a piece to buy a pair of pants and 72 yuan is left, and the matching purchase is 18 yuan a set, so you can also buy 4 sets.

Solution: Set the person with the least score to the x question.

5x-3（24-x）=8

x=1010+10-1=19 questions.

19*5-(24-19)*3=95-15=80 points x 20 +8=x 15

x=480

(1) 1202) 6 games.

4) 3 sets. Calculation: (1) (1 2) * (2 3) * (3 4)...2010/2011)=1/2011

2) Let the minimum score be correct x and wrong 24-x, 5*x-3*(24-x)=8 x=10

The highest score is at least 19 correct answers = 19 * 5 - 5 * 3 = 80 (3) set to go along the river for t hours, and against the water for t + 8 hours.

20t=15(t+8) t=24 then the total distance = 24h * 20km h = 480km

If 12 minutes are all calculated by Li Ming, and 12*15=180 questions are calculated, a total of 195 questions, that is, Wang Gang calculated (195-180) (18-15) = 5 minutes, and Li Ming calculated 7 minutes.

Suppose Li Ming takes time x

Then Wang Gang took 12-x

15x+18（12-x）=195

3x=21x=712-x=5

Let Li Ming use x minutes to obtain the equation: 15x+18(12-x)=195, and find x=7

Li Ming took 7 minutes, Wang Gang took 12-7=5 minutes.

1.[1-(3 8+3 10)] 1 10 = 13 4 (days), 20 5% = 1000 (g) 1000-200 = 800 (g) 3The number of people is a multiple of , i.e. a multiple of 7 3 2 = 42, and less than 50 people swim round, so it is 42 people.

42-42 (1 7+1 3+1 2)=42-41=1 A person wins the Ji Fan Early Reading Award.

8 out of 1? 5 of the 8 points of the shrine collapse, right?

A did 5 8 8 = 5 hours, and B also did 5 hours. 5 30 = 150 (pcs).

13 40 1 8 = days).

10% 5%-200=200 (grams).

3*2=42 (person).

There is 1 person who won the Yin Nian Award.

4. A made 8/5, it should be 5/8 of A's lead feast.

B did: 5*30=150 (pcs).