MATHS [1 Mark Question Answer]

The smallest number which is rounded off to 80 is 75
and the largest number which is rounded off to 80 is 84.

The numbers that can be rounded off to 50 are:
46, 47, 48, 49, 51, 52, 53, 54

The numbers that can be rounded off to 30 are:
26, 27, 28, 29, 31, 32, 33, 34

₹ 27
₹ 27 – ₹ 30

545 cm
545 – 550 cm

837 m
837 – 840 m

₹ 562
₹ 562 – ₹ 560

89,24,379 – 89,24,380
89,24,379 – 89,24,400
89,24,379 – 89,24,000

7,293 – 7290
7,293 – 7,300
7,293 – 7000

56,293 – 56,290
56,293 – 56,300
56,293 – 56,000

68,076 – 68,080
68,076 – 68,100
68,076 – 68,000

54,547 – 54550
54,547 – 54500
54,547 – 55000

1249 – 1250
1249 – 1200
1249 – 1000

864 – 860
864 – 900
864 – 1000

27487 – 30000

32974 − 30000

4327 – 4000

578 – 600

578 – 580

If the tens digit is 5 or more than 5, increase the hundreds digit by 1 and replace each of tens digit and ones digit by 0.
83294 – 83000

If the tens digit is 5 or more than 5, increase the hundreds digit by 1 and replace each of tens digit and ones digit by 0.
9248 – 9000

If the tens digit is 5 or more than 5, increase the hundreds digit by 1 and replace each of tens digit and ones digit by 0.
32568 – 33000

If the tens digit is 5 or more than 5, increase the hundreds digit by 1 and replace each of tens digit and ones digit by 0.
25352 – 25000

If the tens digit is 5 or more than 5, increase the hundreds digit by 1 and replace each of tens digit and ones digit by 0.
6732 – 7000

If the tens digit is 5 or more than 5, increase the hundreds digit by 1 and replace each of tens digit and ones digit by 0.
6475 – 6000

If the tens digit is less than 5, replace each one of the tens and once digits by 0 and keep the other digits as they are:
59237 – 59200

If the tens digit is less than 5, replace each one of the tens and once digits by 0 and keep the other digits as they are:
6388 – 6400

If the tens digit is less than 5, replace each one of the tens and once digits by 0 and keep the other digits as they are:
5432 – 5400

If the tens digit is less than 5, replace each one of the tens and once digits by 0 and keep the other digits as they are:
2667 – 2700

If the tens digit is less than 5, replace each one of the tens and once digits by 0 and keep the other digits as they are:
784 – 800

If the tens digit is less than 5, replace each one of the tens and once digits by 0 and keep the other digits as they are:
748 – 700

The smallest number which is rounded off to 130 is 125
and The largest number which is rounded off to 130 is 134.

67 and 44
67 to the nearest ten 70 and, 44 to the nearest ten = 40
∴ Required sum (70 + 40) = 110

843 ÷ 33
843 ÷ 33 is (approximately to the nearest 10) equal to 840 ÷ 30 = 28

444 ÷ 42
444 ÷ 42 is (approximately to the nearest 10) equal to 440 ÷ 40 = 11

355 ÷ 26
355 ÷ 26 is (approximately to the nearest 10) equal to 360 ÷ 30 = 12

198 ÷ 24
198 ÷ 24 is (approximately to the nearest 10) equal to 200 ÷ 20 = 10

77 ÷ 22
77 ÷ 22 is (approximately to the nearest 10) equal to 80 ÷ 20 = 4

84 ÷ 23
84 ÷ 23 is (approximately to the nearest 10) equal to 80 ÷ 20 = 4

87 ÷ 28
(87 ÷ 28) is (approximately to the nearest 10) equal to 90 ÷ 30 = 3

The smallest number which is rounded off to 80 is 75
and the largest number which is rounded off to 80 is 84.

The numbers that can be rounded off to 50 are:
46, 47, 48, 49, 51, 52, 53, 54

The numbers that can be rounded off to 30 are:
26, 27, 28, 29, 31, 32, 33, 34

₹ 27
₹ 27 – ₹ 30

545 cm
545 – 550 cm

837 m
837 – 840 m

₹ 562
₹ 562 – ₹ 560

27487 – 30000

32974 − 30000

4327 – 4000