# Knowing Our Numbers – Chapter 1/CBSE Class 6 Mathematics

Extra Questions for Practice/Model Questions

Answer the following:

- Write in expanded form: 32, 09,348

Answer: 3000000 + 200000 + 9000 + 40 + 8 - Compare and fill in the blanks with symbols <, >

a) 304521 — 340521

b) 998028 — 849280

Answer:

a) 304521 < 340521 b) 998028 > 849280 - Put comma and write the number name in Indian System of Numeration: 328509

Answer: 3, 28,509

Three lakh twenty eight thousand five hundred nine. - Put comma and write the number name in International system of Numeration: 45876902

Answer: 45, 876, 902

Forty five million eight hundred seventy six thousand nine hundred two. - Round off to nearest tens, hundreds and thousands: 2568

Answer:

Nearest tens: 2570

Nearest hundreds: 2600

Nearest thousands: 3000 - Find the estimated value of 2827 + 5048

Answer: 2827 rounds off to 3000

5048 rounds off to 5000

Estimated sum = 3000 + 5000 = 8000 - Find the estimated value of 9872 – 2845

Answer: 9872 rounds off to 10000

2845 rounds off to 3000

Estimated difference = 10000 – 3000 = 7000 - Find the estimated value of 758 x 35

Answer: 758 rounds off to 800

35 rounds off to 40

Estimated product = 800 x 40 = 32000 - Solve using expanding brackets: 327 x 102

Solution: 327 x (100 + 2) = 327 x 100 + 327 x 2

= 32700 + 654 = 33354 - Write in Roman Numerals: 485

Answer: 485 = 400 + 80 + 5 = CDLXXXV