3rd Grade Rounding Worksheets | Rounding Numbers to 10 and 100 - Free Printable

Problem Analysis:

The task involves rounding numbers to the nearest 10 and the nearest 100. The instructions provide a number line as a visual aid to help with rounding. Let's break it down step by step.

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#### Part 1: Rounding to the Nearest 10
We are given the following numbers:
- 26
- 73
- 49
- 86
- 51

Rounding Rule for Nearest 10:
- If the digit in the ones place is 5 or greater, round up.
- If the digit in the ones place is less than 5, round down.

Let’s round each number:

1. 26: The ones digit is 6 (greater than 5). Round up to 30.
- Answer: 30

2. 73: The ones digit is 3 (less than 5). Round down to 70.
- Answer: 70

3. 49: The ones digit is 9 (greater than 5). Round up to 50.
- Answer: 50

4. 86: The ones digit is 6 (greater than 5). Round up to 90.
- Answer: 90

5. 51: The ones digit is 1 (less than 5). Round down to 50.
- Answer: 50

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#### Part 2: Rounding to the Nearest 100
We are given the following numbers:
- 320
- 890
- 460
- 610
- 550
- 940

Rounding Rule for Nearest 100:
- If the tens digit is 5 or greater, round up.
- If the tens digit is less than 5, round down.

Let’s round each number:

1. 320: The tens digit is 2 (less than 5). Round down to 300.
- Answer: 300

2. 890: The tens digit is 9 (greater than 5). Round up to 900.
- Answer: 900

3. 460: The tens digit is 6 (greater than 5). Round up to 500.
- Answer: 500

4. 610: The tens digit is 1 (less than 5). Round down to 600.
- Answer: 600

5. 550: The tens digit is 5 (equal to 5). Round up to 600.
- Answer: 600

6. 940: The tens digit is 4 (less than 5). Round down to 900.
- Answer: 900

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Final Answers:

#### Part 1: Rounding to the Nearest 10
- 26 → 30
- 73 → 70
- 49 → 50
- 86 → 90
- 51 → 50

#### Part 2: Rounding to the Nearest 100
- 320 → 300
- 890 → 900
- 460 → 500
- 610 → 600
- 550 → 600
- 940 → 900

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Boxed Final Answer:

\[
\boxed{
\begin{array}{ll}
\text{Nearest 10:} & 30, 70, 50, 90, 50 \\
\text{Nearest 100:} & 300, 900, 500, 600, 600, 900
\end{array}
}
\]