- Ordering Rounding and Order of Operations
- Home
- Introduction to Inequalities
- Comparing a Numerical Expression With a Number
- Ordering Large Numbers
- Rounding to Tens or Hundreds
- Rounding to Hundreds or Thousands
- Rounding to Thousands, Ten Thousand, or Hundred Thousand
- Estimating a Sum of Whole Numbers
- Estimating a Difference of Whole Numbers
- Estimating a Product of Whole Numbers
- Estimating a Quotient of Whole Numbers
- Writing Expressions Using Exponents
- Introduction to Exponents
- Power of 10: Positive Exponent
- Power of 10: Negative Exponent
- Introduction to Parentheses
- Comparing Numerical Expressions With Parentheses
- Introduction to Order of Operations
- Order of Operations With Whole Numbers
- Order of Operations With Whole Numbers and Grouping Symbols
- Order of Operations With Whole Numbers and Exponents: Basic
- Selected Reading
- UPSC IAS Exams Notes
- Developer's Best Practices
- Questions and Answers
- Effective Resume Writing
- HR Interview Questions
- Computer Glossary
- Who is Who
Estimating a Sum of Whole Numbers Online Quiz
Following quiz provides Multiple Choice Questions (MCQs) related to Estimating a Sum of Whole Numbers. You will have to read all the given answers and click over the correct answer. If you are not sure about the answer then you can check the answer using Show Answer button. You can use Next Quiz button to check new set of questions in the quiz.
Q 1 - Estimate the sum 343 + 5,209 + 148, by first rounding each number to the nearest hundred.
Answer : A
Explanation
Step 1:
As 4 < 5
343 estimated to nearest hundred is 300
Step 2:
As 0 < 5
5209 estimated to nearest hundred is 5200
Step 3:
As 4 < 5
148 estimated to nearest hundred is 100
Step 4:
So the estimated sum by rounding each number to the nearest hundred is
300 + 5,200 + 100 = 5,600
Q 2 - Estimate the sum 553 + 2,841 + 751, by first rounding each number to the nearest hundred.
Answer : C
Explanation
Step 1:
As tens digit is 5
553 estimated to nearest hundred is 600
Step 2:
As 4 < 5
2841 estimated to nearest hundred is 2800
Step 3:
As tens digit is 5
751 estimated to nearest hundred is 800
Step 4:
So the estimated sum by rounding each number to the nearest hundred is
600 + 2,800 + 800 = 4,200
Q 3 - Estimate the sum 6,432 + 2,529 + 12,126, by first rounding each number to the nearest thousand
Answer : B
Step 1:
As 4 < 5
6432 estimated to nearest thousand is 6000
Step 2:
As hundreds digit is 5
2529 estimated to nearest thousand is 3000
Step 3:
As 1 < 5
12,126 estimated to nearest thousand is 12,000
Step 4:
So the estimated sum by rounding each number to the nearest thousand is
6,000 + 3,000 + 12,000 = 21,000
Q 4 - Estimate the sum 2,732 + 5,681 + 18,401, by first rounding each number to the nearest thousand
Answer : C
Explanation
Step 1:
As 7 > 5
2732 estimated to nearest thousand is 3000
Step 2:
As 6 > 5
5681 estimated to nearest thousand is 6000
Step 3:
As 4 < 5
18,401 estimated to nearest thousand is 18,000
Step 4:
So the estimated sum by rounding each number to the nearest thousand is
3,000 + 6,000 + 18,000 = 27,000
Q 5 - Estimate the sum 8,332 + 1,783 + 10,006, by first rounding each number to the nearest thousand
Answer : D
Explanation
Step 1:
As 3 < 5
8332 estimated to nearest thousand is 8000
Step 2:
As 7 > 5
1783 estimated to nearest thousand is 2000
Step 3:
As 0 < 5
10,006 estimated to nearest thousand is 10,000
Step 4:
So the estimated sum by rounding each number to the nearest thousand
8,000 + 2,000 + 10,000 = 20,000
Q 6 - Estimate the sum 3,723 + 683 + 945, by first rounding each number to the nearest hundred.
Answer : A
Explanation
Step 1:
As 2 < 5
3723 estimated to nearest hundred is 3700
Step 2:
As 8 > 5
683 estimated to nearest hundred is 700
Step 3:
As 4 < 5
945 estimated to nearest hundred is 900
Step 4:
So the estimated sum by rounding each number to the nearest hundred is
3,700 + 700 + 900 = 5,300
Q 7 - Estimate the sum 218 + 3,617 + 469, by first rounding each number to the nearest hundred.
Answer : C
Explanation
Step 1:
As 1 < 5
218 estimated to nearest hundred is 200
Step 2:
As 1 < 5
3617 estimated to nearest hundred is 3600
Step 3:
As 6 > 5
469 estimated to nearest hundred is 500
Step 4:
The estimated sum by rounding each number to the nearest hundred is
So 200 + 3,600 + 500 = 4,300
Q 8 - Estimate the sum 590 + 675 + 1,628, by first rounding each number to the nearest hundred.
Answer : B
Explanation
Step 1:
As 9 > 5
590 estimated to nearest hundred is 600
Step 2:
As 7 > 5
675 estimated to nearest hundred is 700
Step 3:
As 2 < 5
1628 estimated to nearest hundred is 1600
Step 4:
The estimated sum by rounding each number to the nearest hundred is
600 + 700 + 1,600 = 2,900
Q 9 - Estimate the sum 2,516 + 6,341 + 1,450, by first rounding each number to the nearest thousand
Answer : A
Explanation
Step 1:
As hundreds digit is 5
2516 estimated to nearest thousand is 3000
Step 2:
As 3 < 5
6341 estimated to nearest thousand is 6000
Step 3:
As 4 < 5
1450 estimated to nearest thousand is 1000
Step 4:
So the estimated sum by rounding each number to the nearest thousand is
3,000 + 6,000 + 1,000 = 10,000
Q 10 - Estimate the sum 8,439 + 5,816 + 7,121, by first rounding each number to the nearest thousand.
Answer : D
Explanation
Step 1:
As 4 < 5
8439 estimated to nearest thousand is 8000
Step 2:
As 8 > 5
5816 estimated to nearest thousand is 6000
Step 3:
As 1 < 5
7121 estimated to nearest thousand is 7000
Step 4:
So the estimated sum by rounding each number to the nearest thousand is
8,000 + 6,000 + 7,000 = 21,000