Fill in the blanks.
1.288 thousand nine hundred (), the approximate number in ten thousand years is ().
2. February of1990 is () days.
3. Both internal angles of a triangle are 65, and this triangle is called () triangle.
6 o'clock on April 2nd = () hours.
5.4 hectares and 50 square meters = () square meters.
6. The parallelogram has an area of 72 square meters, a height of 6 meters and a base length of ().
7. 1.04 is pronounced as ().
Second, judge whether the following questions are true or false.
1. The longer the sides of an angle are, the larger the angle is. ( )
The decimal point 2. 1.3 is shifted three places to the right, which is 1300. ( )
307,000 kilometers is 7 kilometers. ( )
4.8: 15 is 8 15. ( )
5. 14.090= 14.09。 ( )
Three. Fill in "=" and ">" in ○. Or "
1.0.94 hectares ○4900 square meters
2.506 billion 5.06 billion
3.0.35 Magnification 10 times ○0.35 Decimal point is shifted to the left by two places.
4. Number of days in leap year ○ 1994 days.
Fourth, arrange the following figures in descending order.
1.3.36 3.6 3.56 3.599
2.0.7 0.609 0.6908 0.66
5. Use a simple method to calculate.
1.74×53+47×74 2.2 169–642–358
3.948+ 106 1+52+939 4. 125×64
Six, off-type calculation.
1.375+ 137÷(69+68) 2.2.5+28.6+0.73
3.5.06–(3. 14+0.4) 4.4900–20+ 15× 17
Seven, column calculation.
1. A number minus 7.3 1 equals 14.29. What's this number?
2.2460 minus the product of 52 and 26, how much do you get?
Eight, application questions.
1. A canteen bought a batch of rice, ate 158 Jin, and the remaining 32 Jin was four times less than the amount eaten. How many Jin of rice did you buy in the canteen?
The printing house printed 48 million books in 20 days. Printing tens of thousands of books in 35 days at this rate?
The weather temperature in the week of March and May is 18,19,20,19,21,23,20 respectively. What is the average daily temperature this week?
4. Eggs are packed in 144 boxes, with 504 eggs per box, if there are 648 eggs per box. How many boxes can be vacated in this way?
5. Reclaim triangular wasteland with bottom length 120m and height of 80m. How many hectares of land have been reclaimed?