Who has the quantity and measurement of mathematics is like an apple () gram similar topic.

Selection of quantity and measurement

Source: Review and evaluation of the new curriculum concept of primary school mathematics.

1, 7.25 hours = () hours () minutes; 4 days = () hours;

7 tons and 5 kilograms = () tons; 2.09 kg = () km;

125m =()km； 250 cm = () meters;

9 square meters 6 square centimeters = () square decimeter;

4500 square meters = () hectares;

8.78 cubic meters = () cubic decimeter;

1450mm =()L()mL；

3 cubic meters and 50 cubic decimeters = () cubic meters.

Children's Day is in () month, and there are () days in this month.

The 2008 Olympic Games will be held in China. This year is (), and there are () days throughout the year.

There were () days in February 2006, () days in the first quarter and () days in the second quarter of this year.

5. Fill in the appropriate numbers in the brackets.

A bottle of Sprite is 2.5 liters, or () milliliters.

A truck can carry 3.5 tons of goods, that is,1million tons (2 million kilograms).

6. Fill in the appropriate unit name in brackets.

Xiaoming is tall 1.58 () and weighs 40 (). His bed area is about 3 (), and he sleeps 10 () every night. The space in his bedroom is about 45 ().

7. A pencil is19 (); -6℃ is ()℃ lower than 6℃.

8. Known: Fahrenheit = 1.8+32. 98.6 degrees Fahrenheit is equivalent to () degrees Celsius, and 50 degrees Celsius is equivalent to () degrees Fahrenheit.

9. Xiaoming started doing his homework at 6: 55 pm and finished it at 7: 20 pm. It took him () minutes, or () hours. In the meantime, the minute hand on the clock turned () degrees.

10. A car left Jinhua for Hangzhou at 23:40 and arrived in Hangzhou at 3:25 the next morning. The car has been driving for () hours.

1 1. Botanists want to know the diameter of an ancient number. Can you help him? What you did was ().

12.29.05.2006 Three Gorges Dam

After the completion, the future power supply scope of the Three Gorges Project.

Its radius will reach 1000 km (as shown in the figure).

(1) The power supply area is () square kilometers.

(2) The power supply area accounts for about () of the national land area (9.6 million square kilometers).

13. Spring scales can be used to weigh the mass of objects. The length of spring extension is different for objects with different suspension qualities. Look at the table below and fill in the blanks.

Weight of object (kg)

Spring extension length (cm)

(1) If a 5 kg object is suspended, the length of spring extension is () cm;

(2) If an object of 1.5 kg is suspended, the length of spring extension is () cm.

Second, judge the problem.

1. Xiao Qiang's height is1.4m. Of course, he can wade across a river with an average depth of 1.35m without danger. ()

2. The volume of a cigarette case is 105 cubic centimeter. ()

3. A kettle contains 2.5 liters of water, which can fill 10 250 ml cups. ()

The number of days in the first quarter of this year is the same as that in the second quarter. ()

The speed of the hour hand on the clock face is the speed of the minute hand. ()

Three. Multiple choice questions

1. Please estimate that () is close to your age.