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All questions of Place Value and Rounding for Class 8 Exam
What is the place value of the digit 3 in the number 6,439?- a)30
- b)300
- c)3000
- d)3
Correct answer is option 'B'. Can you explain this answer?
What is the place value of the digit 3 in the number 6,439?
a)
30
b)
300
c)
3000
d)
3
 | Torcia Education answered |
The digit 3 is in the hundreds place, so its place value is 300.
What is 9.825 rounded to 2 decimal places?- a)9.8
- b)9.82
- c)9.83
- d)9.9
Correct answer is option 'C'. Can you explain this answer?
a)
9.8
b)
9.82
c)
9.83
d)
9.9
 | Mansi Sengupta answered |
Understanding Rounding Numbers
Rounding numbers is a method of simplifying a number while retaining its value close to the original. In this case, we are rounding the number 9.825 to two decimal places.
Steps to Round 9.825
1. Identify the Decimal Places
- The number 9.825 has three decimal places: 8, 2, and 5.
2. Locate the Second Decimal Place
- The second decimal place in 9.825 is the number 2.
3. Look at the Next Decimal Place
- The next decimal place (third place) is 5.
4. Apply Rounding Rules
- If the digit in the third decimal place is 5 or greater, we increase the second decimal place by 1.
- If it is less than 5, we keep the second decimal place unchanged.
5. Make the Decision
- In this case, since the third decimal place is 5, we add 1 to the second decimal place (2 + 1 = 3).
6. Final Rounded Number
- Therefore, rounding 9.825 to two decimal places gives us 9.83.
Conclusion
The correct answer is option 'C': 9.83. This process ensures that we accurately round numbers while following standard rounding conventions.
Rounding numbers is a method of simplifying a number while retaining its value close to the original. In this case, we are rounding the number 9.825 to two decimal places.
Steps to Round 9.825
1. Identify the Decimal Places
- The number 9.825 has three decimal places: 8, 2, and 5.
2. Locate the Second Decimal Place
- The second decimal place in 9.825 is the number 2.
3. Look at the Next Decimal Place
- The next decimal place (third place) is 5.
4. Apply Rounding Rules
- If the digit in the third decimal place is 5 or greater, we increase the second decimal place by 1.
- If it is less than 5, we keep the second decimal place unchanged.
5. Make the Decision
- In this case, since the third decimal place is 5, we add 1 to the second decimal place (2 + 1 = 3).
6. Final Rounded Number
- Therefore, rounding 9.825 to two decimal places gives us 9.83.
Conclusion
The correct answer is option 'C': 9.83. This process ensures that we accurately round numbers while following standard rounding conventions.
How would you write the number seven thousand, six hundred and thirty-three in figures?- a)3,667
- b)6,337
- c)7,366
- d)7,633
Correct answer is option 'D'. Can you explain this answer?
a)
3,667
b)
6,337
c)
7,366
d)
7,633
| | Torcia Education answered |
7 thousands, 6 hundreds, 3 tens and 3 ones
2,468 - re-order this number to get the largest even number.- a)2,468
- b)4,286
- c)6,842
- d)8,642
Correct answer is option 'D'. Can you explain this answer?
a)
2,468
b)
4,286
c)
6,842
d)
8,642
| | Torcia Education answered |
All of the digits are even so just re-arrange them - highest, then second highest, then third then least
What is 277 rounded to 1 significant figure?- a)2
- b)30
- c)200
- d)300
Correct answer is option 'D'. Can you explain this answer?
a)
2
b)
30
c)
200
d)
300
| | Torcia Education answered |
It's closer to 300 than to 200
What is 3.114 rounded to 1 decimal place?- a)3
- b)3.1
- c)3.2
- d)3.4
Correct answer is option 'B'. Can you explain this answer?
a)
3
b)
3.1
c)
3.2
d)
3.4
| | Torcia Education answered |
The 1 is less than 50 so is rounded down
What is 448 rounded to the nearest 100?- a)300
- b)400
- c)500
- d)600
Correct answer is option 'B'. Can you explain this answer?
a)
300
b)
400
c)
500
d)
600
| | Torcia Education answered |
It is closer to 400 than 500
How many hundreds are there in the number 42?- a)0
- b)1
- c)2
- d)4
Correct answer is option 'A'. Can you explain this answer?
a)
0
b)
1
c)
2
d)
4
| | Torcia Education answered |
The number 42 is lower than 100!
How many thousands are there in the number 4,647?- a)2
- b)4
- c)6
- d)7
Correct answer is option 'B'. Can you explain this answer?
a)
2
b)
4
c)
6
d)
7
| | Torcia Education answered |
4,000 (thousands) + 600 (hundreds) + 40 (tens) + 7 (ones)
What is 3.98 rounded to 1 significant figure?- a)3
- b)4
- c)5
- d)6
Correct answer is option 'B'. Can you explain this answer?
a)
3
b)
4
c)
5
d)
6
| | Torcia Education answered |
It's closer to 4 than to 3
What is 450 rounded to the nearest 100?- a)300
- b)400
- c)500
- d)600
Correct answer is option 'C'. Can you explain this answer?
a)
300
b)
400
c)
500
d)
600
| | Torcia Education answered |
If a number is halfway between two values, round upwards
What is 448 rounded to the nearest 10?- a)400
- b)440
- c)450
- d)500
Correct answer is option 'C'. Can you explain this answer?
a)
400
b)
440
c)
450
d)
500
| | Torcia Education answered |
A lot of numbers in everday life are rounded
What is the place value of the digit 9 in the number 9,321?- a)9000
- b)900
- c)90
- d)9
Correct answer is option 'A'. Can you explain this answer?
What is the place value of the digit 9 in the number 9,321?
a)
9000
b)
900
c)
90
d)
9
| | Torcia Education answered |
The digit 9 is in the thousands place, so its place value is 9000.
What is 7,891 rounded to the nearest 1,000?- a)7,000
- b)7,500
- c)7,800
- d)8,000
Correct answer is option 'D'. Can you explain this answer?
a)
7,000
b)
7,500
c)
7,800
d)
8,000
| | Torcia Education answered |
7,891 is only 109 less than 8,000 but 891 more than 7,000
What is the value of the digit 7 in the number 7,482?- a)7
- b)70
- c)700
- d)7,000
Correct answer is option 'D'. Can you explain this answer?
What is the value of the digit 7 in the number 7,482?
a)
7
b)
70
c)
700
d)
7,000
| | Torcia Education answered |
In the number 7,482, the digit 7 is in the thousands place. Therefore, its value is 7,000.
How many ones are there in the number 9?- a)5
- b)7
- c)9
- d)11
Correct answer is option 'C'. Can you explain this answer?
a)
5
b)
7
c)
9
d)
11
| | Torcia Education answered |
There are no tens, hundreds or thousands in the number 9
What is 6,691 rounded to 1 significant figure?- a)6
- b)66
- c)670
- d)7,000
Correct answer is option 'D'. Can you explain this answer?
a)
6
b)
66
c)
670
d)
7,000
| | Torcia Education answered |
As the number has 4 columns the significant figure is 1,000
What is 1.784 rounded to 2 decimal places?- a)1
- b)1.7
- c)1.78
- d)1.79
Correct answer is option 'C'. Can you explain this answer?
a)
1
b)
1.7
c)
1.78
d)
1.79
| | Torcia Education answered |
The 4 is less than 5 so is rounded down
How many hundreds in the number 6,814?- a)1
- b)4
- c)6
- d)8
Correct answer is option 'D'. Can you explain this answer?
a)
1
b)
4
c)
6
d)
8
| | Torcia Education answered |
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