First, oral calculation. (4 points)
86÷2= 0×25= 900÷3= 840÷2=
90÷6= 70÷5= 68÷4= 27÷9=
96÷8= 56÷7= 600÷2= 66+30=
88÷8= 63÷3= 480÷6= 50×4=
5 1÷3= 35×2= 95+70= 80-47=
0÷5= 52÷4= 3600÷4= 28- 19=
84÷4= 20×4= 490÷7= 160÷4=
72+ 18= 400-4= 160÷8= 720÷9=
2 10÷7= 90×2= 65÷5= 75÷5=
16×3= 100÷5= 100×7= 35÷7=
Fill in the blanks. (26 points) (65438+ 0 points per grid)
(1)100000 is (),1010 million is (), and one million includes () million.
(2) The unit of counting digits of the number 7406000 is ().
Read: _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _.
(3) A multi-digit plus 1 equals 65438+ million, and this number is ().
(4) The bit of 20002002 is (), the "2" on the right represents two (), the "2" in the middle represents two (), and the "2" on the left represents two ().
(5) (0, 1,2,3,4 ...) indicates that the number of objects is called _ _ _ _ _ _ _, the smallest natural number is _ _ _ _ _ _ _, the natural number of is _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _.
(6) In the _ _ _ _ _ _ _ century, China invented _ _ _ _ _ _ _ _ _ _.
(7) In the electronic calculator, ON/C is the _ _ _ _ _ _ _ _ key, and CE is the _ _ _ _ _ _ _ _ _ _ key.
(8) One bit to the left of the billion bits is () bit, and one bit to the right is () bit.
(9) In the number 7 184395690, "4" is in the position of (), which means (); 1 at () position, indicating ().
(10) Please use the five numbers of 4, 7, 6, 5 and 0 to form a five-digit number, which is _ _ _ _ _ _ _ _ _ _ _ _ _ _,
The smallest five digits are _ _ _ _ _ _ _ _ _ _ _.
Please be the referee (put √ in brackets for the right and × for the wrong) (8 points)
(1) The number one year older than 9.99 million is written as 10000000. ( )
(2)6200000700 When reading this number, only a zero is read. ( )
(3) A seven-digit number with tens of millions of digits. ( )
(4) The approximate figure of 763404829 is 800 million. ( )
(5) The number consisting of 80 hundreds of thousands and 54 tens is 800054. ( )
(6) Units, ten, hundred, thousand and ten thousand are all counting units. ( )
(7) The advance rate between two counting units is ten, and this counting method is called decimal counting method. ( )
(8) When reading multiple digits, no matter how many zeros are at the end of each stage; Read it all. ( )
Fourth, read the numbers below. (8 points)
The pronunciation of 603000700 is: _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _.
The pronunciation of 59080300 is: _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _.
The pronunciation of 3080000007000 is: _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _.
The pronunciation of 850000000000 is: _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _.
5. Write down the following figures. (8 points)
6.387 billion writing: _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
996.58 million writing: _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
Five million nine hundred and eighty-three thousand and fifty writing: _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
604040 Writing: _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
6. Fill in ">,< or =". (4 points)
654032 5790040 1000235 980000
34 million, 334 million, 9 million, 3.6 million, 9 million.
Seven, think about it, even for a while. (5 points)
9875000 8400050 4005200 700980000 32 10000
700 million, 32 1 10,000, 9.88 million, 8.4 million, 40 1 10,000.
Eight, 9007, 8999, 9994, 90899, 10000, in descending order. (5 points)
()& lt()& lt()& lt()& lt( )
Write a number consisting of the following numbers. (10)
(1) 300 million, 800 million, 6500. Writing: _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
(2) Sixty million, 900,000 and 700. Writing: _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
(3) one billion seven hundred and four thousand. Writing: _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
(4) Nine million, six thousand and two tens. Writing: _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
(5) Five tens of millions, eight hundreds of thousands and eight ones. Writing: _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
Ten, first write the number on the horizontal line, and then rewrite it into a number with "ten thousand" or "hundred million" as the unit. (10)
(1) The circumference of the equatorial circle of the earth is about 40 million meters. Writing: _ _ _ _ _ _ = _ _ _ _ _ _
(2) The total length of human blood vessels is about 4 million meters. Writing: _ _ _ _ _ _ = _ _ _ _ _ _
(3) The global population has exceeded 6 1 100 million. Writing: _ _ _ _ _ _ = _ _ _ _ _ _
(4) There are more than14 billion brain cells. Writing: _ _ _ _ _ _ = _ _ _ _ _ _
(5) Xincheng Primary School covers an area of more than 30,000 square meters. Writing: _ _ _ _ _ _ = _ _ _ _ _ _
Eleven, use the "rounding" method to omit the mantissa after ten thousand digits and find the divisor. (6 points)
3003000≈ 304492≈ 10377009≈
9686759≈ 565005≈ 9099700≈
Twelve, use the "rounding" method to omit the mantissa after hundreds of millions of digits and find the divisor. (6 points)
9030900000≈ 990000009≈ 1483 1000000≈
5270229000≈ 4969200000≈ 100008560≈