1. Fill in the blanks (2 points for each question, *** 18 points. )

1, 5500050006 billion 2,8450.25

3、6.596 6.60 4、8 8: 1

5. There are countless cycles 6, 1/5 7, 2 9, 15.

8、 12 1 9、550

Second, the choice (65438+ 0 points per question, ***4 points)

1、(4) 2、(2) 3、(3) 4、(3)

Third, the judgment (65438+ 0 points for each question, ***4 points)

1、× 2、× 3、√ 4、×

Four, calculation (26 points)

1, write the number directly (8 points)

2. Calculation (3 points for each question, *** 12 points)

① 1000 ② 75 ③ 3.8 ④ 1

(Note: process scores 2 points, result 1 minute)

3, solve the equation (3 points per question, ***6 points)

① 140 ② (note: 2 points for the process, and 1 minute for the result)

Five, do the questions as required (9 points)

1, 4 points; Cartography should be standardized.

2, 5 points.

2× 2× 2+3.14× (2 ÷ 2) 2× 3 =11.14 (cubic meter)

Six, only comprehensive formula or equation, can't calculate. (2 points for each question, ***6 points)

1, solution: Let this number be x. 25%x=36×

2、(3.9-7.5÷5)×0.25

3、3. 14×20×90× 100

Seven, (3 points for each question, ***9 points)

1、400÷

2,400+400× or 400× (1+)

3、400× ÷60%

Eight, solve the problem (6 points per question, ***24 points. )

1, 3. 14× (20 ÷ 2) 2 = 3 14 (square meter)

Answer (omitted)

2.3. 14× 2.52× 2 = 39.25 (m3)

545× 39.25 = 21391.25 ≈ 21391(kg)

Answer (omitted)

3. Solution: Set 30 people to plant trees.

90:5= :30

=540

Answer (omitted)

4、( 12-8)÷8=0.5=50%

( 18.5- 12)÷ 12≈54.2%

Answer (omitted)

Nine, 10.

(96 ÷ 3× 1× 2+96) ÷ (3+2) = 33.6 (km/h)

Answer (abbreviated).