2009 Spring 6th Grade Chinese Mathematics Final Sprint 100 points

1 three-quarters divided by three-sevenths represents (4 3 7 3), quotient is (4 7), and a number divided by a fraction is equal to this number multiplied (divided by the reciprocal of this fraction).

2 In 9 out of 10: 3 out of 5, the former term of the ratio is (10 9) and the ratio is (2 3). If nine-tenths is three-fold larger, to keep the ratio constant, three-fifths should be (threefold increase).

3 The reciprocal of two-sevenths is (2 7), and the reciprocal number of 0 4 is (4 5).

4 A piece of wood is 5 meters long, and it is divided into four equal parts, each of which is (4 1) meters, and three-quarters of it is used, and (3 20) meters remain.

5 In the same circle, the ratio of radius to diameter is (2:1).

6 Arrange the following numbers in order from smallest to largest.

57．2％ 0．5777777……Four out of five 0 6666 ......

0．6666……＜57．2％＜0．5777777……Four-fifths).

7 The school planted 40 moonflowers, with a survival rate of 95, and (38) survived.

The circumference is 12 56 decimeters of the circle, and the area is (square m).

10 two-thirds (40) cents five-eighth tons = (725) kilograms one and two-fifths of a liter (1) liter (400) milliliters.

2. True/False Question 1 Multiply a number by a fraction, the product is equal to itself, and the number is 1. （

2 A rope is 1 meter long, half of it is used, and half of it is left. （

3 The original price of a teacup is 10 yuan, and the current price is 8 yuan, which is reduced by 2 (

4 For a job, Xiaohong does it alone in 8 days to complete, and completes three-eighths of the work in 3 days. （

5 The greater the circumference of a circle, the greater the pi. （

6 Flour rate of wheat The mass of wheat is divided into the mass of flour 100 (

3. Multiple choice questions.

1 Add 5 g of salt to 160 g of water, salt accounts for (b) of the brine

a 1/32 b 33 c 5/16.

2 Use a 62-8 decimeter long wire to enclose a square and a circle, respectively, and compare the areas of these two figures, (a).

A has a large circular area, B has a large square area, and c is equally large.

3 The isosceles trapezoid has (a) axes of symmetry.

a1 b2 c3

4 For a project, Team A completes it in 4 days alone, and Team B completes it in 6 days, and the work efficiency of Team A and Team B is the simplest ratio (b).

a2:3 b3:2 c3

5 Divide two and a half into a percentage (c).

a2．5％ b220％ c250％

One, fill in the blanks.

Less than; Third; Two thirds;

I guess the circumference has increased, right? 24；

Second, true/false questions.

3. Multiple choice questions.

a;b;b;No answer;

Fourth, answer questions.

4×（x-20）=5×40

4x-80=200

4x=280

x=705x×6=25×8

30x=200

x = twenty thirds.

I. 15;30；16；Less than; Third; Two thirds; 4:1；4；4000；5；8；4；40；50；；5；

Two; III. a; b；b；No answer;

4. 1. Solution: 40 (x-20) = four-fifths 40 = (x-20) 4 5 x-20=50 so x=20+50 x=70

2. Solution: one-fifth = five-fifths of twenty-fifths five-fifths 8 x = sixths of twenty-fifths so 5 8 x=6

40 x = 6 x = 40 6 x = six and two-thirds.

I. 15;30；16；Less than; Third; Two thirds; 4000；8；4；40；24；6π；3π；5；；

Two; III. a; b；b；No answer;

4. 4 (x-20) = 5 40

4x-80=200

4x=280

x=706×5x=8×25

30x=200

x = twenty thirds.

Solve equation 4 (x-20) = 5 40

x-20=200/4

x-20=50

x=706×5x=8×25

30x=200

x = twenty thirds.

15,30,16,Less than,2/6,2/2/3,4,4:1,4000,5,8,4,40,128,,,5,,,Right,Pair,a,b,b,a,40 (x-20)=4/5 Same denominator and then reduced to x-20=50 x=70,1/5*8 x=6/25 8/5 6/25 Same molecule 24/15 100/24 Approx. 15x=100 x=3/20 or x=

1.Why did Beethoven play another song for the blind girl? Guess what Beethoven had in mind at the time and write it down.

Beethoven was moved by the girl's kind, pure, and beautiful heart, and played a song for the brother and sister. After playing a song, he was infected by the brother and sister's love for ** and the blind girl's understanding**, so he played another song.

2.After learning "Moonlight Song", if Beethoven is right in front of your eyes, what do you want to say to this great ** master?? Think about it and write it down. I would like to say to Beethoven:

Hey, hey, hey, hey, hey, he

You are a person who loves to help others, and I want to learn from you.

1) r = m).

2 meters. r=8+2=10(m)8m.

square meters) 2) 10000 * 5 * yuan).

50 (kg).

5) Analyze the workload of each group in a day:

A + B = 1 36 (i).

B + C = 1 45 (ii).

A + C = 1 60 (iii).

i)+(iii)-(ii)=>

2*A = 1 36 + 1 60-1 45 = (5 + 3-4) 180 = 1 45

A = 1 90

Therefore, it takes 1 (1 90) = 90 days for a person.

The rest is your own.

1.There are several ways to solve the first problem Let's talk about the simplest After the road is built, the length and width of the pool and the road are 54 28, the area is 1512, and the area of the pool is 50*24=1200, so the area of the road is 1512-1200=312

2.Principal x Interest Rate x Time = Interest.

3.If the weight of the barrel is a, then the weight of gasoline is, that is, 12a=48, a=4kg is the weight of the barrel, and gasoline is 50kg

4.If there is damage a, then the one that is not damaged is 2000-a (2000-a)*yuan, which is calculated as a=17.

5.A, B and C respectively need abc days, that is, a + b = 36 b + c = 45 a + c = 60, and a is calculated as b is c is.

1.Answer.

2.100000 answers.

3.Set the barrel weight x oil weight 100 8x 3x 48 108 8x solution (calculate it yourself).

4.(2000 2 3796) 8 Answers.

1) Divide by (10 times 10 minus 8 times 8).

2) 10000 multiplied by 5.

1.(1)4/13÷(7/10-3/5)=4/13÷（7/10-6/10）=4/13÷1/10=40/13。

3) 5000* yuan.

2) Cucumber area: 400*30%=120m2, cabbage area: 400*35%=140m2;

The area of rape and green onion is 400-120-140=140 m2;

The yield of cucumber and cabbage is 8*(120+140)=2080kg.

Yuan, 480 80% = 384 yuan.

1050 yuan.

1, (1) 4 13 (7 10-3 5) 3 and 1 13 (2) (18 + 6) 45% 53 and 1 3

3) 5000 5 yuan).

2) Cucumber 400 30% 120 (square meters), cabbage 400 35% 140 (square meters).

Rape and green onions 400 (20%+15%) 140 (m²) yield (120+140) 8 2080 (kg) question supplement.

3) Original price: 480 (1-40%): 800 (yuan), weekend 480, 80%, 384 (yuan).

4) 4 + 3 + 5 12 840 3 5 12 1050 (yuan) (5) 2 3 (1 + 2 3) 40%.

1.（1）(7/10-3/5)÷4/13=13/40（2）(18+6)÷45％=

2) Cucumber planting area = 30 400 = 120 square meters, cabbage planting area = 35 400 = 140 square meters, rape planting area = 20 400 = 80 square meters, green onion planting area = 15 400 = 60 square meters, 80 60 140 square meters.

Cucumber yield = 120 8 = 960 kg.

Yield of cabbage = 140 8 = 1120 kg.

960 1120 = 2080 kg.

Question supplement: 3) The original price of the suit is 480 (1 40%) 800 yuan after a 20% discount, and the price is 800 80% 640 yuan.

4) The money donated by the third shift 3 840 (4 3 5) 5 1050 yuan (5) The percentage of the goods transported by A in this batch of goods is 1 (1 3 2) 40

1(1) 4 13 (7 10-3 5)=40 13(2) Number B = (18+6) 45%=160 3(3) After maturity Exemption from interest tax = 5*(5000*2(1) 3 (12+3)=20%.

2) Cucumber 400*30%=120 Cabbage 400*35%=140

400*(20%+15%)=140 400(30%+35%)*8=2080(3) Original price 480 (1-40%)=800 Discount 480*80%=384

A few minutes.

The number of people who participated in the notification of Hui's.

The total number of people who were notified.

15 + 16 = 31)

After notifying the 15 students, it took (4) minutes.

If there are 50 students in a 6th grade class, it will take at least (6) minutes to get to know everyone.