6 th maths solution 1.1

3. How many ten thousands are there in the smallest 6 digit number?

Answer: 10

Explanation: The smallest 6-digit number is 1,00,000 (One Lakh). To find how many ten thousands are in it, divide 1,00,000 by 10,000.
1,00,000 ÷ 10,000 = 10.

4. Observe the commas and write down the place value of 7.

(i) 56,74,56,345          (ii) 567,456,345

Answer:

1. The commas are placed according to the Indian System. The digit 7 is in the Ten Lakhs place.
   Place value = 70,00,000 (Seventy Lakhs).
2. The commas are placed according to the International System. The digit 7 is in the Millions place.
   Place value = 7,000,000 (Seven Million).

5. Write the following numbers in the International System by using commas.

(i) 347056      (ii) 7345671      (iii) 634567105      (iv) 1234567890

Answer:

1. 347,056
2. 7,345,671
3. 634,567,105
4. 1,234,567,890

6. Write the largest six digit number and put commas in the Indian and the International Systems.

Answer: The largest 6-digit number is 999999.

• Indian System: 9,99,999
• International System: 999,999

7. Write the number names of the following numerals in the Indian System.

(i) 75,32,105      (ii) 9,75,63,453

Answer:

1. Seventy-five lakh thirty-two thousand one hundred five.
2. Nine crore seventy-five lakh sixty-three thousand four hundred fifty-three.

8. Write the number names in words using the International System.

(i) 345,678      (ii) 8,343,710      (iii) 103,456,789

Answer:

1. Three hundred forty-five thousand six hundred seventy-eight.
2. Eight million three hundred forty-three thousand seven hundred ten.
3. One hundred three million four hundred fifty-six thousand seven hundred eighty-nine.

9. Write the number name in numerals.

(i) Two crore thirty lakh fifty one thousand nine hundred eighty.
(ii) Sixty six million three hundred forty five thousand twenty seven.
(iii) Seven hundred eighty nine million two hundred thirteen thousand four hundred fifty six.

Answer:

1. 2,30,51,980
2. 66,345,027
3. 789,213,456

10. Tamil Nadu has about twenty six thousand three hundred forty five square kilometre of Forest land. Write the number mentioned in the statement in Indian System and International System.

Answer: The number is 26345.

• Indian System: 26,345
• International System: 26,345

11. The number of employees in the Indian Railways is about ten lakhs. Write this in the International System of numeration.

Answer: Ten lakhs in numerals is 10,00,000.
In the International System, it is written as 1,000,000 (One million).

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