4th Grade Rounding Whole Numbers Quiz: 10 Questions with Answers

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This 4th grade rounding quiz covers rounding whole numbers (Common Core 4.NBT.A.3), with a free PDF to print.

Key takeaway: This quiz helps fourth grade students quickly check how well they can round whole numbers and use rounding to estimate.

Topic: Rounding Whole Numbers (4th grade)
Content: 10 multiple-choice questions with instant explanations
Standards: 4.NBT.A.3
Answers: Explanations included
Format: Free printable PDF, US Letter, black and white

This quiz helps fourth grade students quickly check how well they can round whole numbers and use rounding to estimate. Also, it has 10 multiple choice questions, and the wrong choices come from real mistakes, such as ignoring the digit to the right.

The questions cover rounding to the nearest hundred, thousand, ten, and ten thousand, a nine that carries, news numbers, an estimated sum, an estimated difference, and a halfway number. Then, plan about 10 minutes. Then read each explanation to see why the wrong choices tempt students.

Choose the best answer for each of the 10 questions about rounding. Read each question carefully, then check the explanation to learn from any mistake.

Grade 4 · Common Core State Standards: 4.NBT.A.3

4th grade rounding quiz: 10 questions

Question 1

What is \(5,748\) rounded to the nearest hundred?

Question 2

36,500 on a number line.

What is \(36,500\) rounded to the nearest thousand?

Question 3

Point at 457.

Which is 457 rounded to the nearest ten?

Question 4

What is \(9,972\) rounded to the nearest hundred?

Question 5

What is \(284,615\) rounded to the nearest ten thousand?

Question 6 and after

Question 6

A newspaper reports that about 4,000 fans watched a game, rounded to the nearest thousand. Which could be the exact attendance?

Question 7

Rounded values.

Maya rounded \(5,823\) and \(3,140\) to the nearest thousand to estimate \(5{,}823 + 3{,}140\). What is her estimate?

Question 8

Estimate \(48{,}720 – 21{,}390\) by rounding each number to the nearest ten thousand.

Question 9

A report says 23,000 people live in a town (rounded to the nearest thousand). Which could be the exact population?

Question 10 and after

Question 10

Diego says \(2,450\) rounded to the nearest hundred is \(2,400\). Which statement is correct?

Remember

To round, look at the digit to the right of the place you want.
Digits 5, 6, 7, 8, and 9 round up. Digits 0, 1, 2, 3, and 4 round down.
A number exactly halfway between two multiples rounds up: 2,500 rounds to 3,000.
Then, a 9 can carry: 9,960 rounds to 10,000 at the nearest hundred.
To estimate, round every number to the same place, then add or subtract.

Common mistakes with this 4th grade rounding quiz

Students round a number like 8,980 down at the nearest hundred. The tens digit is 8, so the number rounds up to 9,000.
Students round down when the digit to the right is 4 or more but they mix up the cutoff. Instead, digits 5 and above round up, and digits 4 and below round down.
Students choose a number far from the reported value. Also, the exact number must be in the range that rounds to the report.
Students agree that a halfway number rounds down. Instead, the rule sends a 5 up. Slow down at that step and check it twice.

Tips to get a high score

Underline the rounding place, circle the digit to its right, and then decide. This three part habit works every time.
Check that your rounded number is a multiple of the place value. For example, a hundred must end in two zeros.
Teachers can use a halfway number as a short debate on why the rule sends it up. Repeat this habit on every problem for the best results.

Download the 4th grade rounding quiz as a PDF with the button below and keep it with your notes.

4th grade rounding quiz: frequently asked questions

Why do halfway numbers round up?

People agreed on one rule so everyone gets the same answer. A number exactly halfway between two multiples could go either way. The rule sends it up, so 12,500 rounds to 13,000.

How do you estimate a sum by rounding to thousands?

Round each number to the nearest thousand, which makes the sum easy. For 4,810 plus 2,190, round to 5,000 plus 2,000, which is 7,000. The exact sum is also 7,000, so the estimate is excellent.

How do you know which numbers could round to a reported amount?

Find the range for the stated place. If a report gives 15,000 to the nearest thousand, the exact number is from 14,500 up to 15,499. A number such as 14,600 fits, but 14,400 does not.

All Grade 4 chapters: Grade 4 math.

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