Knowing Our Numbers – Chapter 1.

MODEL QUESTIONS FOR CBSE CLASS 6 MATHS
Knowing Our Numbers – Chapter 1
Choose the correct answer from the options given below:

1. Which is the greatest number among these numbers?
   A. 383398
   B. 389833
   C. 388933
2. The place value of 4 in 5679432 is ————-
   A. 4
   B. 40
   C. 400
3. Which of the following is correct according to International System of Numeration?
   A. 32,546,798.
   B. 32,54,67,98
   C. 3, 25, 46,798.
4. Use the given digits without repetition and make the smallest 4 digit number: 7,0,3,8.
   A. 7038
   B. 3780
   C. 3078
   Fill in the blanks:
5. The arrangement from the smallest to the greatest is known as ———
6. The new number which comes next to 99999 is ———
7. The face value of 6 in 7689043 is ——————–
8. One crore = ————– million.
   Answer the following:
9. The population of Kochi is 212000 and population of Ooty is 88430. What is the total population?
10. Find the estimated sum by rounding off to nearest hundreds of
    578 + 346 + 768.
11. Sohani and Reeta work for 6 days; Sohani works 5 hours a day and Reeta 8 hours a day. How many hours do both of them work in a week?
12. Write the expressions for each of the following using brackets:
    a) Four multiplied by the sum of nine and two.
    b) Seven multiplied by the difference of eight and three.
13. Add 450 and 50 and express the answer in Roman numerals.
14. Round off the following numbers to the nearest ten, hundred and thousand.
    a) 875
    b) 4576
15. Reverse the order of digits and write the number name of the new number in International System of Numeration: 6785432.

ANSWERS:

1. 389833
2. 400
3. 32,546,798
4. 3078
5. Ascending order
6. 100000
7. 6
8. 10 million
9. Population of Kochi = 212000
   Population of Ooty = 88430
   Total population = 212000 + 88430 = 300430.
10. 578 rounds off to 600.
    346 rounds off to 300.
    768 rounds off to 800.
    Estimated sum = 600 + 300 + 800 = 1700
11. Hours that Sohani worked = 5 hours
    Hours that Reeta worked = 8 hours
    Number of days they worked together = 6 days
    Total hours both of them worked together = 6(5 + 8) = 6 x 13 = 78 hours.
12. a) 4 (9 + 2)
    b) 7 (8 -3)
13. 450 + 50 = 500
    The Roman numeral representation of 500 is D.
14. a) 875
    Nearest ten is 880.
    Nearest hundred is 900
    Nearest thousand is 1000.
    b) 4576
    Nearest ten is 4580.
    Nearest hundred is 4600.
    Nearest thousand is 5000.
15. 2, 345, 876.
    Number name is Two million three hundred forty five thousand eight hundred seventy six.