Class name score

I. Fill in the blanks (22 points)

1.40kg = ton hour = () minutes.

2. 100 is 75,25 tons, and 13 is () tons.

The reciprocal of 3.9 is (); The reciprocal of () is.

4. One kilogram of soybean can extract oil, 528 1 kg of soybean can extract () kg of oil, and it takes () kg of soybean to extract 1 kg of oil.

5.3.5 = () ÷ 6 = = (): () The simplest ratio

6. The number A is the number B, the ratio of the number B to the total number of Party A and Party B is (), and the difference between the two numbers is equivalent to the number B..

7. put ">" in ○. , "<, or" = ".

78 ×54 ○ 54 1× ○ 1÷ 14 ÷0. 1○ 14 × 10

8.8 tons of coal, after 14, 14 tons will be used, and1* * will use () tons.

9. The former term of a ratio is 16, and the ratio is 13, and the latter term is ().

10.A needs 15 hours, b needs 10 hours, the simplest travel time ratio between a and b is (), and the walking speed ratio between a and b is ().

1 1. There are five fewer girls than boys in one class, with a ratio of 3: 2. There are * * * () students in this class.

2. Judge whether the following statements are correct (4 points)

1. Both factors are 34, and their product formula is 34 ×2. ( )

2. both a and b are non-zero natural numbers. If a ×= b \u, then a < B. ()

3. If the number 14 of A and the number 13 of B are equal, the ratio of A to B is 4: 3 ().

4.3: 8, the former item will be increased by 6, and the latter item will be expanded by 3 times, keeping the proportion unchanged. ( )

Three. Choose the serial number of the correct answer and put it in brackets (4 points)

1. Because × = 1, so ().

A. it's reciprocal b, reciprocal c, and reciprocal d, and reciprocal.

2.a is a natural number that is not 0. In the following categories, the largest number is ().

a . a×b . a . c . a . d

3. Take out 15 from a pile of coal and give it to pile B.. At this time, the tonnage of the two piles of coal is equal, so the ratio of tonnage of pile A and pile B is ().

Answer 5: 4 Answer 6: 5 Answer 5: 3 Answer 3: 5.

4. 100g sugar water contains 25g sugar, and the ratio of sugar to sugar water and sugar to water is () respectively.

A. 1: 4 and 1: 3b. 1: 4 and1:5 and 1: 4 d. 1: 5 and/kloc.

Four. calculate

1. Numbers written directly (4 points)

2 1× = ÷2= × = ÷ =

5 12 ÷56 = 12÷ = 1÷59 = 536 ×0=

2. Solve the equation (6 points)

1 1 12 x = 56÷x = 34 x÷25 =