Question

1. Five crore, sixty lakh, three hundred twent
2. Forty-five crore, ten lakh, seventy-two.
3. Thirty-two crore, twenty lakh, four hundred thirty-five.
1. Round off 73,81,529 to the nearest :
1. 10
2. 100
3. 1,000
4. 10,000
5. 1,00,000
MENTAL MATHS
1. How many hundreds are there in 2,56,000?
2. How many hundreds are there in 1 million?
3. Write the predecessor of 10 millions.
4. Write the greatest 4-digit number using three different digits.
5. Place-value of a digit can never be less than its face-value. Is it true?
6. What is the greatest 4-digit even number you can make?
7. What is the smallest 5-digit odd number you can make?
8. Write twelve million, one hundred six thousand, three hundred seven in figures.
9. How many 3-digit numbers are there in all?
10. Find the sum of the place values of two 5s in 50,29,653.​

Answer 1

Answer:

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Answer 2

Answer:

1. Five crore, sixty lakh, three hundred twenty

5,60,00,320

2. Forty-five crore, ten lakh, seventy-two.

45,10,00,072

3. Thirty-two crore, twenty lakh, four hundred thirty-five.

32,20,00,435

1. Round off 73,81,529 to the nearest :

10  is  73,81,530

100  is  73,81,500

1,000  is  73,82,000

10,000  is   73,80,000

1,00,000  is   74,00,000

Mental Maths

1. How many hundreds are there in 2,56,000?

  2,56,000 ÷ 100 = 2560 hundreds

2. 1 million = 100,000,000

    100,000,000 ÷ 100 = 1,000,000 hundreds

3. Predecessor = previous number

10 million = 10,000,000

Predecessor of 10,000,000 = 9,99,999

4. 9987 is the greatest 4-digit number using three different digits.

5. Place-value of a digit can never be less than its face-value.

Yes it is true because... eg:- 5678

Place value of 7 is 70 but its face value is 7,

70>7

6. Greatest 4-digit even number = 9998

7. Smallest 5-digit odd number = 10001

8. twelve million, one hundred six thousand, three hundred seven

12,106,307

9. There 900 3-digit number (from 100-999)

10. Sum of the place values of two 5s in 50,29,653.​

Place value of the 5s = 50,00,000 and 50

Sum = 50,00,000+50

        = 50,00,050

Hope it helps you