The most error prone calculation questions in Grade 6 have more than 10 questions!!!!! With answers

1.0 is the smallest positive number and -1 is the smallest negative number. (False) 2

Natural numbers are either odd or even, prime or composite. (False) 3It contains 5 1s and 3 1-10s.

False) 4It can be written as 60%, and the meter can also be changed to 20% meter. (False) 5

The more digits a decimal place, the larger its counting unit and the larger this decimal place will be. (False) 6Any number divided by 0 is equal to 0

False) 7Factoring 45 into prime factors is: 45 = 3*3*5*1.

False) 8The number of factors of a number is finite, whereas the number of multiples is infinite. (right) 9

If a b = 5, then a must be a multiple of b. (right) 10Wrong).

11.2750 25 + 1250 75 = (2750 + 1250) (25 + 75) = 4000 100 = 40 (false).

12.When x=5, y=6, x+2y=5+6*2=17. (right) 13 4x+5x=9x*9x。Wrong).

Meters of steel pipe, after 14 meters are cut, there are 3 meters left. （

The kilogram is reduced by 110 and then increased by 110, and the result is still 10 kilograms. （

3. The number of pine trees is 15 more than that of cypress, and the number of cypress trees is 15 less than that of pine trees.

4. The product of the two true fractions must be less than 1. （

5. After a barrel of oil has been used up to 15 of it, there is more left than it is used. （

1. When two true fractions are divided, the quotient must be greater than the dividend. (

2. The simplest integer ratio is 48:24. (

Kilograms weigh as much as 2 kilograms. (

4. The number of A is more than the number of B, so the number of B is less than the number of A.

5. The ratio of the previous and subsequent terms at the same time expanded by 2 times, the ratio unchanged. (

1) The fruit store transports a total of 390 kilograms of apples, bananas, and pears in a day, the weight of apples is 1 5 times that of pears, and the weight of bananas is 3 4 times that of pears.

2) A tank of water, use 1 2 and 5 buckets, there is 30% left, how many buckets of water are in this tank?

3) There is a cube of timber with a fast edge length of 20 cm, planed into a cylinder with the largest bottom diameter, what is the volume of planed wood?

4) A steel pipe is 10 meters long, the first time it was cut off 7 10, the second time it was cut off the remaining 1 3, how many meters are left?

5) Two teams assemble radios, Group A assembles 50 units per day, and completes 10% of the total task on the first day, at this time Group B starts to assemble, assembles 40 units per day, how many days does Group A do when completing this batch of tasks?

6) After building a highway and completing the full length of 2 3, kilometers from the midpoint, how many kilometers is the total length of this road?

7) The master and apprentice made a batch of parts together, and the apprentice made 2 7 of the total number, 21 less than the master, how many parts are in this batch?

8) Two teams build a road, team A repairs the full length of 1 5 every day, and team B repairs it alone for 7 5 days. If the two teams practice together for 2 days, and the rest is practiced by team B alone, how many days will it take to complete?

9) There is a batch of fertilizer in the warehouse, the first time the total number is taken out 2 5, the second time the total number is taken out 1 3 less 12 bags, at this time there are 24 bags left in the warehouse, how many bags are taken out in total in two times?

10) The front wheel rotates 40 times more than the rear wheel in a distance of 720 meters, if the circumference of the rear wheel is 2 meters, find the circumference of the front wheel.

In the attached page three, the figure on the left is enlarged by 3:1, and cut out, folded into a closed three-dimensional figure, a cardboard box and the corresponding edge length ratio of the folded three-dimensional figure is 10:1, how much cardboard is needed to make this carton at least, and what is the volume.

The plane figure rotates around the axis, which three-dimensional figures are obtained?? (The axis is a straight line standing vertically).

1, half of the semicircle (half of the semicircle, is horizontal, high on the line of the axis) 2, the half of the trapezoidal 3, semicircle (the axis is vertical, the diameter of the semicircle is the line of the axis).

The two baskets of pears of A and B weigh a total of 130kg, give 1 4 of A to B, at this time, A's pears are equivalent to 6 7 of B, how many kg of pears do each of the two baskets of A and B?

One yuan can buy a bottle of soda, two empty bottles can be exchanged for a bottle of soda, if you are given 20 yuan, how many bottles of soda can you drink at most?

420+580-64×21÷28

Primary 6 Mathematics General Review Material (6) [Easy Calculation].

Class: Name:

1. Oral arithmetic of the following questions. (23 points).

2. Write down the laws or properties used in simple calculations for each of the following questions (12 marks).

3. Calculate in a simple way. (65 points).

1) Fifty-two and eleven twenty-fifths seventy-nine and eleven twenty-tenths

2+2+2+2+……2+2 (2000 numbers from 3-2002, so there are 1000 2s) +2+1

4 and 5 both use a conversion formula 1 (a b) = 1 (b-a) (1 a-1 b).

For example, 1 15 = 1 (3 5) = 1 (5-3) (1 3-1 5) = 1 2 (2 15) = 1 15 can be verified.

4) (1 2/2) + (2 1/3) + (3 4/1) + ....10 11 in 11).

5) One-third + one-fifteenth + one-thirty-fifth + sixty-third + ninety-nine.

6) One and a half - five sixths + seven twelves - ninety tenths + eleven thirty - thirteen forty-two + fifteen fifty-sixths.

According to the hint, 1 and 1 2 = 1 + 1 2, +1 2 + 1 3 = 5 6 ......)

This homework is not fast, and the answer to the question has come out while thinking about the question by yourself, and it is enough to do it yourself for 40 points.

1 Set the bag to be $x, then 120-x = (75-x) * 3-15, get x = 45 yuan.

2 If there are x chickens, then there are x-15 rabbits, 2x=4(x-15)-26 x=43 chickens, and 28 rabbits.

3 Set correct x lane, false 10-x lane 10x-4(10-x)=2 x=3 to 3 channels, 7 false channels.

4 If each room can accommodate x people, then 15x+34=21x-2 x=6, the total number of people is 15*6+34=124

Let the younger brother have x yuan left, and the ** of the wallet will remain unchanged Set it to the same amount of 120-(3x-15)=75-x, and solve it to get x=30 (so cheap, I like it).

2 Rabbits x chickens x 15.

Chickens have two legs and rabbits have four legs So.

2 (x+15) = 4x x = 15 There are 30 chickens, and if she answers x questions correctly, she answers 10-x questions incorrectly.

10x-4(10-x)=2 Solve to get x=3 (good tragic child) Set x people per dormitory The number of students is eternal and unchanged, set to the same quantity: 15x+34=21x-2 Solve to get ......x=6 Next, please do your own calculations, I hope it will help you.

(1) This schoolbag is x yuan.

120-x+15=(75-x)*3

x=302) chickens x rabbits have x-15

2x=(x-15)*4-26

x = 43 chickens and 28 rabbits.

3) Answer question X correctly.

10x-(10-x)*4=2

x = 3 (4) per dormitory for x people.

15x+34=21x-2

x=6 This batch of students has 15*6+21=111

1.Set the schoolbag to be $ x. 120-x+15=(75-x) 3 x=45 yuan.

2.Set the chickens to x. 2x=(x-15) 4-26 x=43, the number of rabbits is 43-15=28.

3.Set the answer to the correct x. 10x-(10-x) 4=2 x=3, the number of incorrect answers is 7

4.Each room can accommodate x people. 15x+34=21x-2x=6, then there are 124 students in this batch.

1.Unit: Yuan.

75-30 45 (solution).

Only (30 + 26) 2 28 only (solution 1).

28 + 15 43 (solution 2).

Score (100-2) 14 7 questions (false).

10-7 3 questions (right).

Room 34+2 36 people.

36 6 6 people (solution 1).

15*6+34 124 people (solution 2).

(the original plan) is regarded as the unit "1", and the actual number of meters of road construction is equivalent to the unit "1" (+20)%.

In fact, 20% more roads were built than planned. The actual number of meters of road construction is equivalent to the unit "1" (120)%.

A train is 25 percent faster than a car, the waiting train is 125% or twice as fast as the car, and if the speed of the car is 64 kilometers per hour, then the speed of the train is (64*) kilometers per hour?

Think of the plan as a unit "1", which is equivalent to 120 (1+20).

The speed of this train is equivalent to 125 (1+25) of this train

64 (1+25 )=80 (km).