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# Knowing Our Numbers CBSE Class 6

## Full fledge assessment Videos

Video Based Test funda (Please watch the above videos before attempting this assessment)
Question 1/20

Q 1. Which of the following is used in the Indian numeration system?

Solution

Thousand, lakh and crore are used in the Indian numeration system.

Q 2. How many lakhs make a million?

Solution

10 lakhs = 1 million

Q 3. How many crores make a billion?

Solution

100 crores = 1 billion

Q 4. Both addition and multiplication are

Solution

Both addition and multiplication are commutative and associative.

Q 5. Which of the following numbers is the smallest?

Solution

To check the smallest number, we check if the first digit is the same, then the second digit, and so on, from left to right.

Here, the first digit is the same in all, so we check the second digit.

In 2, 2, 6, 9, the smallest number is 2, but we have the number 2 twice. Hence, we will check the third digit of 1296 and 1269, where 69 is the smallest number.

Hence, 1269 is the smallest number.

Q 6. In the standard form, a number is separated into groups of digits using a

Solution

In the standard form, a number is separated into groups of digits using a comma.

Q 7. 1793 rounded to the nearest thousand is

Solution

1793 rounded to the nearest thousand is 2000.

Q 8. 2367 on rounding to the nearest thousand is equal to

Solution

2367 on rounding to the nearest thousand is equal to 2000.

Q 9. Subtraction is not ____for whole numbers.

Solution

Subtraction is not commutative.

Q 10. Which one is the smallest among 9998, 9997, 9978, 9999?

Solution

9978 < 9997 < 9998 < 9999

Hence, 9978 is the smallest among the given numbers.

Q 11. 2 + (3 + 5) =

Solution

2 + (3 + 5) = (2 + 3) + 5 = (2 + 5) + 3 = 2 + 3 + 5

Using the associative law of addition.

Q 12. x × (y + z) = xy + xz is called

Solution

x × (y + z) = xy + xz is called the distributive law of multiplication over addition.

Q 13. Estimate the nearest to hundred for 897 + 917.

Solution

897 rounded to the nearest hundred is 900.

917 rounded to the nearest hundred is 900.

Hence, 900 + 900 = 1800.

Q 14. Subtraction and division are not

Solution

Subtraction and division are neither commutative nor associative.

Q 15. Which of the following numbers is the smallest number using 6, 1, 8 and 2 without repetition?

Solution

To form the smallest number using the given numbers, we have to arrange the numbers in the ascending order from left to right.

Hence, the greatest number is 1268.

Q 16. The difference of 842 and 356 to the nearest hundred is

Solution

842 rounded to the nearest hundred is 800.

356 rounded to the nearest hundred is 400.

Hence, 800 - 400 = 400.

Q 17. Estimate the nearest to thousand for 1874 + 2452.

Solution

1874 rounded to the nearest thousand is 2000.

2452 rounded to the nearest thousand is 2000.

Hence, 2000 + 2000 = 4000.

Q 18. Estimate 102 × 98.

Solution

102 rounded to the nearest hundred is 100.

98 rounded to the nearest hundred is 100.

Hence, 100 × 100 = 10000.

Q 19. 328 rounded to the nearest hundred is

Solution

328 rounded to the nearest hundred is 300.

Q 20. x × (y - z) = xy - xz is called the

Solution

x × (y - z) = xy - xz is called the distributive law of multiplication over subtraction.

Still have doubt?

## Knowing Our Numbers Notes

#### Revision Notes

Read CBSE Class 6 Mathematics revision notes for Knowing Our Numbers

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## Knowing Our Numbers Doubts and Solutions

Asked by Zeba.khan 3rd February 2020, 12:24 PM
Asked by arthur.ashe49 30th November 2019, 8:41 AM