1.235600 Write (). Rounding to ten thousand digits is recorded as ().

2.5.4 l = () ml for 90 minutes = ()

3. 1.9 includes () 0. 1 and () 0.

4. The greatest common multiple of 12 and 20 is (), and the smallest common multiple of 16,12 and 20 is (). The least common multiple is ()

5. Turn 6: into a simple integer. The ratio is () and the ratio is ().

On a large-scale map, the distance between the two places is 15 cm, and the actual distance between the two places is () kilometers.

7.237%, and 2.38. ()& gt()& gt( )

8. As shown in the figure, the price ratio of coat and trousers is 5: 4, and it should cost () yuan to buy a pair of trousers.

9. Xiaohong said, "There are two coprime composite numbers, and their least common multiple is 72."

Guess, these two numbers make up the simplest score.

10. There are two cylinders with the same bottom area, one with a height of 6.28 cm and a square side; The B-pillar is 3.6 cm high and has a volume of () cubic centimeters.

2. Right or wrong, mark "√" in the right picture and "×" in the wrong question.

1. The pi of a great circle is twice that of a small circle. ( )

2. Cubes with a side length of 6 cm have the same volume and surface area. ( )

3.5.049 Keep one decimal place for rounding, which is about 5.0. ( )

Add 5 to the numerator and denominator of a fraction, and the result is equal to the original number. ( )

Third, fill in the serial number of the correct answer in ().

1. The following scores can be converted into finite scores ().

( 1) (2) (3)

2. In the following formula, () is an equation.

( 1)5x+4 (2)3x-5