Category name
Fill in the blanks. (16)
Two numbers whose product is () and 1 are called mutual ().
2. () ÷16 = 38 =15: () = (): 24 = () (expressed in decimal)
3, a wire length 15 meters, minus () meters, leaving the full length.
4,4: The simplest integer ratio is (). If the former term of this ratio is expanded by 5 times, the latter term should be () to keep the ratio unchanged.
This year, the fifth grade primary school in our city held a subject quality competition, and the number of winners was 360. The proportion of the first, second and third prizes is 1: 2: 3. There are () people who won the second prize.
The increase of 15 tons in 6.5 tons is () tons, and the increase of 15 tons in 5 tons is () tons.
7. If the position of the apple on the right is (2,3), then the position of the pear can be expressed as (,).
The position of watermelon is recorded as (,).
8. The school distributed 72 popular science books to classes A and B according to the ratio of 4∶5. Class A got () books and Class B got () books.
Second, multiple-choice questions (8 points)
1, in brine, the ratio of salt to brine, and the ratio of salt to water is ().
a、B、 1:9 C、 1: 10 D、 1: 1 1
2, and ()
A means the same; B, the decimal units are the same; C, the size is equal; D, I can't be sure.
3. The reciprocal of. () is greater than itself.
A with score b, true score c, false score
4.34 A pile of sand is 202 1 ton. The formula for finding how many tons of this pile of sand is ().
A.202 1×34 b . 34÷202 1 c . 202 1÷34
5.8: 15, if the former item is added with 4, the latter item should be (), and the ratio remains unchanged.
A plus 4 B times 2 C plus 15 D times 1 12.
6. The number of white rabbits is 34 of that of gray rabbits, and the unit is "1".
A. the number of white rabbits B. the number of gray rabbits C. the total number
7, a number (except 0) multiplied by 17, this number is ().
A. Enlarge by 7 times B. Increase by 7 times C. Reduce by 7 times
8. Build a 6-kilometer road and it will be completed in 7 days. It can be repaired in 4 days ().
A.27 B.37 C. 47
Three. True or false (4 points)
The ratio of 1, 30: 10 to the simplest integer is 3. ( )
2. 1 kg equals 5 kg. ()
3. When two numbers are multiplied, the product is not necessarily greater than the factor. ()
4. Because the reciprocal of 1 is 1, the reciprocal of 0 should also be 0. ( )
Fourth, calculation,
1, write directly. (4 points)
49 ×3 = 5÷ 13 = 12 ÷ 13 = 27 ÷27 ×89 =
38 ×2= × = 38 ÷34 = 27 ×( 14 + 13 )=
2. Simplify the proportion. (12)
① 2.5 ∶0.45 ② 24∶827
③ 18 ∶ 14 ④ 34 ∶0.25
3. Find the ratio. (6 points)
45: 0.6 = 40 minutes: 32 hours =
4. Use your favorite method to calculate: (12 points)
5 12 ÷7 + 7 12 × 17 78 -(59 - 18 )
16 + 34 × 23 ÷2 125 ×(56 + 34 )+ 45
5. Simple calculation. (8 points)
13 ×5 12 + 14 × 13 86×385
Verb (abbreviation of verb) Application problem: (30 points)
1, Wang weighs 30 kilograms, which is 5/6 of his brother's weight. His brother's weight is 1/2 of his father's weight. What is his father's weight?
2. There are 360 boys and 56 girls in Hongqi Primary School. How many students are there in Hongqi Primary School?
3. The school divides the task of planting 560 trees into four, five and six grades according to 4: 5: 7. How many trees should be planted in each of the three grades?
The price of a VCD player is 924 yuan, which is 4 15 lower than the original price. What is the original price?
5. The vegetable market shipped 250kg of cucumbers, less than tomatoes 16. How many kilograms of tomatoes and cucumbers were shipped?
Additional question (20 points): Xiao Ming reads more 13 pages on the first day, less 12 pages on the second day and 10 pages left on the third day. How many pages are there in this book?