6TH MATHS TERM 1-EX 1.4 ALL

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Tamil Nadu Board – 6th Maths Term 1 – Exercise 1.4

1.(i) The nearest 100 of 843 is __________.

800 850 900 843

Correct Answer: 800

843 lies between 800 and 900. Since 43 is less than 50, it is rounded down to 800.

1.(ii) The nearest 1000 of 756 is __________.

700 750 1000 756

Correct Answer: 1000

756 is more than 500, so it is rounded up to 1000.

1.(iii) The nearest 10000 of 85654 is __________.

80000 85000 90000 85600

Correct Answer: 90000

85654 is greater than 85000, so it rounds up to 90000.

2.(i) 8567 is rounded off as 8600 to the nearest 10.

True False

Correct Answer: False

8567 rounded to the nearest 10 is 8570, not 8600.

2.(ii) 139 is rounded off as 100 to the nearest 100.

True False

Correct Answer: True

139 is less than 150, so it is rounded down to 100.

2.(iii) 1,70,51,972 is rounded off as 1,70,00,000 to the nearest lakh.

True False

Correct Answer: False

1,70,51,972 round to the nearest lakhs is 1,71,00,000, not 1,70,00,000.

3.(i) Round off 4,065 to the nearest hundred.

4000 4100 4060 4050

Correct Answer: 4100

65 is more than 50, so 4065 is rounded up to 4100.

3.(ii) Round off 44,555 to the nearest thousand.

44000 45000 44500 50000

Correct Answer: 45000

555 is more than 500, so it is rounded up to 45000.

3.(iii) Round off 86,943 to the nearest ten thousand.

80,000 90,000 86,000 87,000

Correct Answer: 90,00,000

86,943 is greater than 85,000, so it is rounded up to 90,000.

3.(iv) Round off 50,81,739 to the nearest lakh.

50,00,000 51,00,000 50,80,000 52,00,000

Correct Answer: 51,00,000

50,81,739 is more than 50,50,000, so it rounds up to 51,00,000.

3.(v) Round off 33,75,98,482 to the nearest ten crore.

30,00,00,000 40,00,00,000 33,00,00,000 35,00,00,000

Correct Answer: 30,00,00,000

33 crore is closer to 30 crore than 40 crore, so it rounds to 30,00,00,000.

4. Estimate the sum of 157826 and 32469 rounded to the nearest ten thousand.

180000 190000 200000 170000

Correct Answer: 190000

157826 rounds to 160000 and 32469 rounds to 30000. Their estimated sum is 190000.

5.(i) Estimate 8074 + 4178 by rounding to the nearest hundred.

12100 12200 12300 12000

Correct Answer: 12200

8074 rounds to 8100 and 4178 rounds to 4200. Estimated sum = 12200.

5.(ii) Estimate 1768977 + 130589 by rounding to the nearest hundred.

1899500 1899600 1899400 1900000

Correct Answer: 1899600

1768977 rounds to 1769000 and 130589 rounds to 130600. Their estimated sum is 1899600.

6. Estimate the increase in population rounded to the nearest thousand.

337000 338000 340000 335000

Correct Answer: 337000

46,81,087 rounds to 46,81,000 and 43,43,645 rounds to 43,44,000. Difference = 3,37,000.

7. The number which rounds to 11000 nearest thousand is:

10345 10855 11799 10056

Correct Answer: 10855

10855 is closer to 11000 than 10000.

8. The estimation to the nearest hundred of 76812 is:

77000 76000 76800 76900

Correct Answer: 76800

76812 rounded to nearest hundred becomes 76800.

9. The number 9785764 rounded to nearest lakh is:

9800000 9786000 9795600 9795000

Correct Answer: 9800000

97,85,764 rounded to nearest lakh becomes 98,00,000.

10. Estimated difference of 167826 and 2765 rounded to nearest thousand is:

180000 165000 140000 155000

Correct Answer: 165000

167826 rounds to 168000 and 2765 rounds to 3000. Estimated difference = 165000.