The title of the first unit of the fourth grade mathematics (1)
1. Fill in the blanks.
(1) () One hundred thousand is one million, and one hundred billion is () hundred million.
(2) Counting from the right of a number, 10,000 digits are the () position, and 100 million digits are the () position.
(3)6539 17420, the highest bit of this number is (), that is, (). Starting with one digit, the number of digits in the seventh digit is (), and the number of digits in the hundred thousand digits is ().
(4) When reading, you should start from position () and read step by step. When reading level 110 million, first read according to the reading method of (), and then read a word () or ().
(5) When writing numbers, start with () and write down step by step. Write () on any number without units.
(6) Number writing method consisting of 8 tens, 6 thousands, 2 hundreds, 4 tens and 7 ones ().
(7) An angle is a graph composed of two () drawn from a point. These two () are angles () and the two rays are angles ().
(8) The degree of acute angle is less than () degrees; An angle greater than () degrees and less than () degrees is called an obtuse angle; The angle of () degree is a right angle, the angle of () degree is a right angle, and the angle of () degree is a fillet.
(9) Fillet = () degree right angle = () degree.
1 fillet = () right angle = () right angle.
At (10)3 o'clock, the angle between the hour hand and the minute hand is () degrees, that is, () angle;
At 6 o'clock sharp, the angle between the hour hand and the minute hand is () degrees, which is () angle;
10, the angle between the hour hand and the minute hand is () degrees, that is, () angle.
The unit of measurement of (1 1) angle is (). Divide a circle into 360 equal parts, and the right angle of each equal part is an angle of () degrees, and record it as ().
The size of the (12) angle is related to (), but has nothing to do with ().
Two. Reading.
365247 pronounced as () 37004 pronounced as ()
50 100800 read () 2006500 read ()
3600000000 is pronounced () and 8040003000 is pronounced ()
Please correct the picture in brackets? , wrong painting? . 1. The longer the two sides of the angle, the greater the degree of the angle. ( )
2. greater than 90? This angle is called obtuse angle. ( )
Three o'clock. 3: 30, the angle between the hour hand and the minute hand is a right angle. ( )
4. A right angle is a straight line and a rounded corner is a ray. ( )
The angle of 5.20 degrees is 100 degrees through a magnifying glass magnified 5 times. ( )
6. You can spell out the angle of 105 degree with a pair of triangular rulers. ( )
Fourth, write numbers.
6573 Writing () 1030 Writing ()
40500 write () 74050 write ()
8.04 billion writing () 60.34 billion writing ()
5. Rewrite the following numbers into words? Wan? Or? Billion? Number of units.
150000= () million 600000 = () million 2590000= () million
240000000000 = () 203000000 = () 59000000000 = () 100 million.
6. Round the following figures to? Wan? A little.
635 100? 1996527? 75600? 209943?
7. Round the following figures to? Billion? A little.
72540000000? 2957000000?
490000000? 29536000000?
8. Fill in ○? & gt& lt？ Or? =? .
78789 79798 600000 23964790 80000008 million
990000000120000001999970200000000702 million.
9. Arrange the following figures in descending order.
( 1) 805,805,008,050,000,858,500,000.
( )
(2)4700350 4700530 3470050 4370050 3740050
( )
Ten, multiple choice questions.
1. The angle is determined by ().
A, the length b of two sides, the divergence degree c of two sides, and the position of the vertex.
2. There are () acute angles in the picture.
3. You can spell the following angles with a pair of triangular rulers ()
80 degrees 120 degrees c 170 degrees
4. The () in the figure below is a fillet.
A. BC
5. Right angle, obtuse angle, right angle and acute angle are arranged in order from big to small ().
A, right angle, acute angle, right angle, obtuse angle b, right angle, obtuse angle, right angle, acute angle
C, obtuse angle, flat angle, right angle, acute angle D, acute angle, right angle, obtuse angle, flat angle
6. There are () corners in the picture on the right.
a、3 B、4 C、5 D、6
XI。 Short Answer Questions
Known as follows? 1=48? , to calculate the degrees of the following angles.
Beg? 2、? 3、? 4、? The degree of 5.
Answers to Unit 1 Test Paper of Grade Four Mathematics Volume I (1)
1. Fill in the blanks.
(1)( 10) One hundred thousand is one million, and one hundred billion has (10) one hundred million.
(2) Starting from the right of a number, the tens of thousands of digits are the fifth and the billions of digits are the ninth.
(3)6539 17420, the highest digit of this number is (1 100 million) digits, which is (9) digits. Starting with one digit, the number of digits on the seventh digit is (3), and the number of digits on the hundred thousand digit is (9).
(4) When reading, you should start reading from the (high) position and step by step. When reading 100 million and 10,000 grades, you should first read according to the reading method of (sub) grade, and then read a word (100 million) or (10,000) at the back.
(5) When writing numbers, start with (high-order) digits and write them down step by step. Write (0) on any number without units.
(6) Digital writing consisting of 8 tens, 6 thousands, 2 hundreds, 4 tens and 7 ones (86247).
(7) An angle is a figure composed of two (rays) drawn from a point, which is an angle (vertex) and the two rays are angular (two sides).
(8) The degree of acute angle is less than (90) degrees; An angle greater than (90) degrees and less than (180) degrees is called an obtuse angle; An angle of (90) degrees is a right angle, an angle of (180) degrees is a flat angle, and an angle of (360) degrees is a fillet.
(9) Fillet =( 360) degree right angle =( 90) degree.
1 fillet =( 2) right angle =( 4) right angle.
At (10)3 o'clock sharp, the angle between the hour hand and the minute hand is (90) degrees, which is a (straight) angle;
At 6 o'clock sharp, the angle between the hour hand and the minute hand is (180) degrees, which is a (flat) angle;
At 10, the angle between the hour hand and the minute hand is (60) degrees, which is a (sharp) angle.
(1 1) Angle is measured in degrees. Divide a circle into 360 equal parts, the right angle of each part is (1) degrees, and write it as (1? )。
The size of (12) angle is related to (the opening angle of both sides of the angle) and has nothing to do with (the length of both sides of the angle).
Two. Reading.
For 365247 read (365247) for 37004 read (37004)
50 100800 reading (5000800) 2006500 reading (206500)
Replace 3600000000 with (3.6 billion) 8040003000 with (8.0403 billion).
Please correct the picture in brackets? , wrong painting? . 1. The longer the two sides of the angle, the greater the degree of the angle. ( ? )
2. greater than 90? This angle is called obtuse angle. ( ? )
Three o'clock. 3: 30, the angle between the hour hand and the minute hand is a right angle. ( ? )
4. A right angle is a straight line and a rounded corner is a ray. ( ? )
The angle of 5.20 degrees is 100 degrees through a magnifying glass magnified 5 times. ( ? )
6. You can spell out the angle of 105 degree with a pair of triangular rulers. (right)
Fourth, write numbers.
6,573 Writing (6573) 103,000 Writing (1003000)
Forty thousand and five hundred writing (40,500) and seventy-four and a half million writing (74,050,000)
8.04 billion writing (80400000)60340 10 billion writing (6003400 10000)
5. Rewrite the following numbers into words? Wan? Or? Billion? Number of units.
150000 = (15) 6000000 = (600) 2590000 = (259) ten thousand.
240000000000 = (24) 2030000000 = (203) 590000000000 = (5.9) billion.
6. Round the following figures to? Wan? A little.
635 100? 640,000 1996527? 2 million 75600? 80 thousand 209943? 2 1000
7. Round the following figures to? Billion? A little.
72540000000? 72.5 billion 295.7 billion? 3 billion
490000000? 500 million 29536000000? 29.5 billion
8. Fill in ○? & gt& lt？ Or? =? .
78789 & lt 79798 600000 & lt 2396479080000 = 8 million.
900 million >; 9000000 1 2000000 & gt； 1999999702000000 > 702 million
9. Arrange the following figures in descending order.
( 1) 805,805,008,050,000,858,500,000.
(805,085,805,805,000,850,000)
(2)4700350 4700530 3470050 4370050 3740050
(3470050 3740050 4370050 4700350 470530 )
Ten, multiple choice questions.
1. The angle is determined by (b).
A, the length b of two sides, the divergence degree c of two sides, and the position of the vertex.
2. There are (2) acute angles in the picture.
3. The following angles can be spelled out with a pair of triangular rulers (B)
80 degrees 120 degrees c 170 degrees
4. (a) in the figure below is a fillet.
A. BC
5. Right angle, obtuse angle, right angle and acute angle are arranged in the order from big to small (B).
A, right angle, acute angle, right angle, obtuse angle b, right angle, obtuse angle, right angle, acute angle
C, obtuse angle, flat angle, right angle, acute angle D, acute angle, right angle, obtuse angle, flat angle
6. There are (d) corners in the picture on the right.
a、3 B、4 C、5 D、6
XI。 Short Answer Questions
Known as follows? 1=48? , to calculate the degrees of the following angles.
Beg? 2、? 3、? 4、? The degree of 5.
Solution:? 2=90? -48? =42?
? 5= 180? -48? -42? =90?
? 4=? 2=42?
? 3= 180? -42? = 138?
& gt& gt& gt More exciting next page? Fourth grade mathematics volume 1 unit 1 examination paper and answer?