Class 6 Exam > Class 6 Notes > Mathematics (Maths) Class 6 > RD Sharma Solutions: Knowing Our Numbers (Exercise 1.7)
Knowing Our Numbers (Exercise 1.7) RD Sharma Solutions | Mathematics (Maths) Class 6 PDF Download
Q1: Estimate the following by rounding off each factor to nearest hundreds:
(i) 730 + 998
(ii) 796 – 314
(iii) 875 – 384
Ans:
(i) It can be rounded off to the nearest hundreds as 700 + 1000 = 1, 700.
(ii) It can be rounded off to the nearest hundreds as 800 – 300 = 500.
(iii) It can be rounded off to the nearest hundreds as 900 – 400 = 500.
Q2: Estimate the following by rounding off each factor to nearest thousands:
(i) 12, 094 + 2, 888
(ii) 28, 292 – 21, 496
Ans:
(i) It can be rounded off to the nearest thousands as 13, 000 + 3, 000 = 16, 000.
(ii) It can be rounded off to the nearest thousands as 28, 000 – 21, 000 = 7, 000.
Q3: Estimate the following by rounding off each number to its greatest place:
(i) 439 + 334 + 4, 317
(ii) 8, 325 – 491
(iii) 1, 08, 734 – 47, 599
(iv) 898 × 785
(v) 9 × 795
(vi) 87 × 317
Ans:
(i) It can be rounded off to its greatest place as 400 + 300 + 4, 000 = 4, 700.
(ii) It can be rounded off to its greatest place as 8, 000 – 500 = 7, 500.
(iii) It can be rounded off to its greatest place as 1, 00, 000 – 50, 000 = 50, 000.
(iv) It can be rounded off to its greatest place as 900 × 800 = 7, 20, 000.
(v) It can be rounded off to its greatest place as 10 × 800 = 8, 000.
(vi) It can be rounded off to its greatest place as 90 × 300 = 27, 000.
Q4: Find the estimated quotient for each of the following by rounding off each number to its greatest place:
(i) 878 ÷ 28
(ii) 745 ÷ 24
(iii) 4489 ÷ 394
Ans:
(i) It can be rounded off to its greatest place as 900 ÷ 30 = 30.
(ii) It can be rounded off to its greatest place as 700 ÷ 20 = 35.
(iii) It can be rounded off to its greatest place as 4000 ÷ 400 = 10.
The document Knowing Our Numbers (Exercise 1.7) RD Sharma Solutions | Mathematics (Maths) Class 6 is a part of the Class 6 Course Mathematics (Maths) Class 6.
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FAQs on Knowing Our Numbers (Exercise 1.7) RD Sharma Solutions - Mathematics (Maths) Class 6
| 1. What are the different types of numbers discussed in the exercise? |  |
Ans. The exercise discusses natural numbers, whole numbers, integers, rational numbers, and irrational numbers.
| 2. How are numbers classified based on their properties? | |
Ans. Numbers are classified based on their properties into different categories such as prime numbers, composite numbers, even numbers, odd numbers, etc.
| 3. Can you explain the concept of irrational numbers in detail? | |
Ans. Irrational numbers are numbers that cannot be expressed as a simple fraction or ratio of two integers. They are non-terminating and non-repeating decimals.
| 4. How are integers different from whole numbers? | |
Ans. Integers include all whole numbers as well as their negative counterparts, while whole numbers only include positive integers starting from zero.
| 5. Why is it important to understand the classification of numbers in mathematics? | |
Ans. Understanding the classification of numbers helps in solving mathematical problems, making calculations more efficient, and having a better grasp of the number system as a whole.
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