"How much do you know about big numbers" PPT courseware 2

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"How much do you know about big numbers" PPT courseware 2

How to read numbers within ten thousand

(1) Starting from the high order, read in numerical order;

(2) When the number is in the thousands place, read it as thousands; when it is in the hundreds place, read it as hundreds...;

(3) There is one 0 or several 0s in the middle, and only one "zero" is read;

(4) No matter how many zeros there are at the end, they will not be read.

◎It takes more than three years for the second hand on a clock to beat 100 million times.

◎One hundred million primary school students holding hands could circle the earth three and a half times.

◎Generally, an adult has about 100,000 hairs.

1,000 normal adults have approximately 100 million hairs.

One (one), ten, one hundred, one thousand, ten thousand, one hundred thousand, one million, ten million, billion... are all units of counting.

Units, tens, hundreds, thousands, ten thousand, hundreds of thousands, millions, tens of millions, billions... are all digits.

1. Classify first;

2. Read from the top;

3. When reading the 10,000 level or 100 million level, read it as a level, and then add the word "ten thousand" or "hundred million" at the end;

4. No matter how many 0s there are at the end of each level, it will not be read. If there is one 0 or several consecutive 0s in other digits, only one zero will be read.

Multiple choice questions

1. Counting from the ones digit to the left, the eighth digit is ( ).

A. Ten thousand B. Hundred thousand

C. Ten million digits D. Million digits

2. One, ten, one hundred, one thousand and ten thousand are all ( ).

A. Digit B. Counting unit

C. Several levels

3. The highest digit of a number is the million digit, which is the ( ) digit.

A, five B, six C, seven D, eight

4. The two digits adjacent to the tens of millions are ( ).

A. Ten thousand and hundreds B. Hundreds and millions

C. Hundreds of millions and tens of thousands D. Millions and hundreds of thousands

Thinking questions

Use four 6s and three 0s to form a seven-digit number that meets the requirements.

1. Numbers that don’t read even a single “zero”:

2. Read only a "zero" number:

3. Numbers that read all three "zeros":

4. The largest seven-digit number:

5. The smallest seven-digit number:

count

⑴. Count one hundred thousand and one hundred thousand, and count the four numbers after seven hundred thousand.

⑵. Count ten million to ten million, and count the six numbers after eighty million.

⑶. For the number of ten thousand or ten thousand, count the six numbers after one hundred and ninety-six million.

guessing game

1. Counting hundreds of thousands, I am between 600,000 and 800,000.

I am( ).

2. Counting millions and millions, I am between nine million and eleven million.

I am( ).

3. Counting ten thousand to ten thousand, I am behind nine million nine hundred and ninety-nine thousand.

I am( ).

little judge

1. Ten thousand, one hundred thousand, one million and ten million are counting units of ten thousand level. ( )

2. The rate of progress between the two counting units is ten. ( )

3. Ten thousand is ten thousand. ( )

4. In the number "50505", the three 5s mean that the numerical value is the same. ( )

self-test

1. Count

(1) Ten thousand to ten thousand, counting from ninety-eight thousand to one million and fifty thousand.

(2) Counting from 5.7 million to 6.2 million.

(3) One million to one million, counting from 7.8 million to 15.8 million.

2. I will fill in

(1) One, ten, one hundred, one thousand, ten thousand, one hundred thousand, one million... are all ( ), and the progress rate between each two adjacent counting units is ( ).

(2) 10 ten thousand is ( ), 10 one hundred thousand is ( ), 10 million is ( ), and one hundred million is ( ) ten million.

(3) The number 4638207 has ( ) digits, and the highest digit is the ( ) digit. The 3 in this number is in the ( ) digit, which means ( ), and the 4 is in the ( ) digit, which means ( ).

(4) Adjacent to the million bit are the ( ) bit and the ( ) bit.

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Update Time: 2024-11-22

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