I. Fill in the blanks (2 points for each question, 20 points for * * *)
1, 5/8×3/7 means: ()
The decimal unit of 2,3/5 is (), and if you add at least () such decimal units, it will become a false fraction.
3. Divide 3 kilograms of sugar into 7 parts, each weighing () kilograms, each accounting for () of the total weight.
4,24, 1/3 is less than 16 ()
5. The decimal unit of1/2+1/3 is (), and the decimal unit of 1/3- 1/4 is ().
The reciprocal of 6,5/8 is (), and the reciprocal of 1 is ().
7. For the simplest fraction, the numerator is reduced by 3 times and the denominator is enlarged by 2 times. Simplified is110, and this score is ().
8,5/9× a, when a (), the product is greater than 5/9; When a (), the product is less than 5/9.
9. The number 2 more than the reciprocal of 1/6 is ().
10, a rope is 6 meters long. The full-length 1/3 was removed for the first time, and the full-length 1/3 was used for the second time, leaving.
Second, the judgment (5 points)
The reciprocal of 1 and 1 is 1, and the reciprocal of 0 is 0. ( )
3/ 10 of 2.3m is equal to 3/ 10 of1m. ( )
To ask the reciprocal of a number, just switch the numerator and denominator of this number. ( )
The reciprocal of a number must be less than this number. ( )
5. Divide 3/5 into 4 parts, each part is 1/4. ( )
Three, the number of direct writing (5 points)
5/7×2/3= 3/ 16×4/9= 12/ 19× 1 1/24= 5/7× 14/25=
3/4+ 1/3× 1/6= 1/6-2/3× 1/8= 12×5/9+ 1/6= 2/5×4+2/5=
1/2× 1/ 15+ 1/3× 1/2= 6/ 1 1×7/8-5/ 12×6/ 1 1=
Four. Narrative topic (3 points for each topic, *** 15 points)
What is the sum of 1, 1/4 and 5/ 12?
2. What is 5/6 minus 3/4 of15?
3.8 How much is 18 more than13?
How much bigger is 2/5 of 4/3 than 1/2?
What is the sum of 0/3 of 65438+5 and 3/4 of 24?
Five, how to calculate how simple (3 points per question, ***24 points)
1、7/ 18×6/7 2、87×3/86 3、 16/5×48×5/ 16
4、(3/7+2/3)×2 1 5、0. 125+0.37+2.63 6、 13/ 14× 13+ 13/ 14
7、 120×2/ 1 19 8、3/4× 17/2 1+5/2 1×3/4-3/4
VI. Application Problems (3 1 min)
1. A bottle of beverage weighs 1/4 kg. How many kilograms is the 1/2 of this drink? (5 points)
2. Both Party A and Party B start from the same place in opposite directions at the same time. Party A rides bicycles at an hour of 58km and motorcycles at an hour of 58km. How many kilometers are they apart after 9/4 hours?
3. There are 128 students in the sixth grade of Guangxin Primary School, of which 5/8 students have reached the standard of physical exercise, and 2/5 of the students who have reached the standard are girls. How many girls have reached the standard? (5 points)
4. The canteen bought 2,700 Jin of Chinese cabbage, 2/5 of which was transported to the canteen and eaten 1/3. How many Jin did you eat? (5 points)
5. There is a sheet piling with * * * 120. I used 3/5 for the first time and 1/6 for the second time. How many pieces of paper have I used twice? (5 points)
6. The ball falls freely from a height, and the height of the bounce after each contact with the ground is 2/5 of that of the previous fall. If the ball falls from a height of 35 meters, what is the height of the third rebound? (6 points)
Supplementary question: (10)
1, Xiao Fei reads a book. On the first day, he read 1/3 of the whole book. The next day, he finished reading the remaining 3/4. How many books did he read in two days? (3 points)
Xiaoming bought a story book with 150 pages. For the first time, she read 1/6. Which page should she start from for the second time? (3 points)
3.1/2+1/6+112+1/20+...+1/9900 (4 points)
/student/down 1/2006925306579 10 . doc
The sixth grade elementary school mathematics volume 1 Unit 2 Feedback examination paper
1. Clever calculation to show your skill: [43 points] student number and name level.
1. Numbers written directly: (10 points)
7 × 3 14 = 67 ÷ 6 = 45 ÷54 = 1.6 ÷ 0.7 = 1÷3× 13 =
5 14 ÷ 5 14 = 18 ÷ 52 = 13 × 0. 15 = 37 ÷ 78 = 12 × 13 ÷ 13 × 12 =
2. Simplified proportion: (4 points) 3. Proportion: (4 points)
25:6.5 1.5:35 0.3:97 17 :5 14
4. Recursive equation calculation: (9 points)
165 × 3 ÷ 45 259 ÷ 54 ÷ 45 ( 78 + 13 16 )÷ 13 16 58 ÷ 720 ×4 × 7 10
5. Solving equations: (8 points)
34:X = 56 15+4 X = 45 X-23 X = 29 X 3.5 = 45
6. Column solution: (12 points)
① What is the sum of ①3 10/0 and 14? 23 of a certain number is 60. What is 79 of this number?
③ The ratio of A to B is 4: 7, and the sum of the two numbers is 56. ④ 14 15 of a is equal to 54 of b, and b is
What is the number b? 20, what's the armor number? Solution of column equation
2. There are many mysteries in the temple of knowledge: (24 points)
1. Divide the 37-meter iron wire into three parts, each part is () meters and each part is 3 meters ().
2. 13 of12 is (); 12 is () times of 13; () of 13 is112; 1 12 of 13 is ().
3.75 tons = () kg 2 hours and 40 minutes = () hours
4.( )÷ 20 = 6 ÷ 8 = ( )24 = 24( ) =( ) :4
5. 37 of the number of apple baskets is equal to the number of pears, where "37" means that the number of baskets in () is regarded as "1", and the ratio of the number of apples to the number of pears is ().
6. Car A runs at 2 o'clock 100 km, and car B runs at 3 o'clock 180 km. The speed ratio between car A and car B is ().
7. 1 The ratio of the number of boys to the number of girls in the class is 14: 13, and the number of girls is the number of boys ().
The ratio of the number of boys to the number of classes is (), and the number of girls accounts for () of the number of classes.
8. Li Shifu processes a batch of parts, and it takes three days to process this batch of parts 14. Then, it processes () batches of parts every day.
Half of this batch of parts can be processed within () days.
9. To build a section of highway, the ratio of repaired and not repaired is 5: 4, and () () of this section of highway has been completed.
10. An isosceles triangle, the ratio of its top angle to its bottom angle is 1: 4, and the degrees of the three internal angles of this triangle.
They are (), () and ().
3. Happy Dolemi. (Fill in the serial number of the correct answer in brackets) (6 points)
1. According to the picture, the correct formula is ().
[ ① 120×45 ② 120÷45 ③ 45 ÷ 120 ]
2. A number greater than 0 divided by 14 is a number (). [① Reduce by 4 times ② Expand by 4 times ③ Reduce 14]
The ratio of 3.0.3m to 20cm is ().
[ ① 23 ② 32 ③ 3:2 ]
4. In 200 grams of salt water, there are 40 grams of salt, and the ratio of salt to water is ().
[ ① 1 : 6 ② 1 : 5 ③ 1 : 4 ]
5. A × 34 = B ÷ 34 (both A and B are greater than 0), then ().
[ ① a>b ② a