The fourth grade first volume mathematics midterm examination paper

_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ Class (in English)

First, fill in the blanks. (4.8. 11.12.13,1,the remaining 0.5, ***23. ) 1. The levels we have studied are (), () and (), and each level has () digits.

2. The Forbidden City in Beijing is the largest palace in the world, with an area of 720,000 ㎡. The number of lines drawn is () digits, the highest digit is () digits, and the writing unit is () ten thousand.

3, four million eight hundred and ninety thousand (), rounded to ten thousand is () ten thousand. 4. Use three, two, 1, 0, 0.

(1), write a five-digit number, and each "0" is read as (); The "2" in the number you wrote means ().

(2) Write a five-digit number, the largest of which is (), and this number is pronounced as: ().

Fill in () zeros between 5, 3 and 3, and it becomes 3003.

6. Sort 99000, 90090, 890000, 900090 and 900009 in descending order: (). (2.5 points) 7. Round the following figures to the nearest 100 million or 10 thousand.

94999 ≈ () 79099999 ≈ () 9511≈ () 795000001≈ () billion.

8. The mantissa after the integer omits10,000 bits is about 230,000. The smallest integer is () and the largest integer is ().

9. A line segment has () endpoints, a ray has () endpoints, and a straight line has () endpoints. You can draw a () straight line after two o'clock and a () straight line after one o'clock. At 10 and 12, the angle formed by the minute hand and the hour hand is (), and at 8 o'clock, the angle formed by the minute hand and the hour hand is (). When 1 1 intersects two straight lines into (), they are said to be perpendicular to each other.