Learn on PengienVision, Mathematics, Grade 5Chapter 1: Understand Place Value

Lesson 6: Round Decimals

In this Grade 5 enVision Mathematics lesson from Chapter 1, students learn how to round decimals to the nearest whole number, tenth, and hundredth by identifying the rounding place, examining the digit to its right, and applying the standard rounding rule for digits 5 or greater. Students use number lines to visualize where a decimal falls between two benchmarks and determine which value it is closest to. The lesson builds decimal place value understanding through guided and independent practice with real-world contexts such as distances and measurements.

Section 1

Procedure: How to Round Decimals

Property

To round a decimal to a given place value, identify the digit in that place. Then, look at the digit immediately to its right.

  • If the digit to the right is 55 or greater (5\geq 5), add one to the digit in the rounding place.
  • If the digit to the right is less than 55 (<5< 5), the digit in the rounding place stays the same.

Finally, drop all digits to the right of the rounding place.

Section 2

Rounding the Same Number to Different Places

Property

The result of rounding a number depends on the place value to which you are rounding. A single number can have multiple rounded values, each corresponding to a different place value and level of precision.

Examples

Book overview

Jump across lessons in the current chapter without opening the full course modal.

Continue this chapter

Chapter 1: Understand Place Value

  1. Lesson 1

    Lesson 1: Patterns with Exponents and Powers of 10

  2. Lesson 2

    Lesson 2: Understand Whole-Number Place Value

  3. Lesson 3

    Lesson 3: Decimals to Thousandths

  4. Lesson 4

    Lesson 4: Understand Decimal Place Value

  5. Lesson 5

    Lesson 5: Compare Decimals

  6. Lesson 6Current

    Lesson 6: Round Decimals

Lesson overview

Expand to review the lesson summary and core properties.

Expand

Section 1

Procedure: How to Round Decimals

Property

To round a decimal to a given place value, identify the digit in that place. Then, look at the digit immediately to its right.

  • If the digit to the right is 55 or greater (5\geq 5), add one to the digit in the rounding place.
  • If the digit to the right is less than 55 (<5< 5), the digit in the rounding place stays the same.

Finally, drop all digits to the right of the rounding place.

Section 2

Rounding the Same Number to Different Places

Property

The result of rounding a number depends on the place value to which you are rounding. A single number can have multiple rounded values, each corresponding to a different place value and level of precision.

Examples

Book overview

Jump across lessons in the current chapter without opening the full course modal.

Continue this chapter

Chapter 1: Understand Place Value

  1. Lesson 1

    Lesson 1: Patterns with Exponents and Powers of 10

  2. Lesson 2

    Lesson 2: Understand Whole-Number Place Value

  3. Lesson 3

    Lesson 3: Decimals to Thousandths

  4. Lesson 4

    Lesson 4: Understand Decimal Place Value

  5. Lesson 5

    Lesson 5: Compare Decimals

  6. Lesson 6Current

    Lesson 6: Round Decimals