Learn on PengienVision, Mathematics, Grade 5Chapter 6: Use Models and Strategies to Divide Decimals

Lesson 2: Estimate Decimal Quotients

Property.

Section 1

Rounding to Estimate Quotients

Property

To estimate a quotient using rounding, round the dividend and the divisor to nearby whole numbers or other numbers that are easy to work with. Then, divide the rounded numbers.

a÷brounded(a)÷rounded(b)a \div b \approx \text{rounded}(a) \div \text{rounded}(b)

Examples

Section 2

Estimate Decimal Quotients Using Compatible Numbers

Property

To estimate a decimal quotient, round the dividend and divisor to compatible numbers. Compatible numbers are numbers that are close to the original numbers and are easy to compute with mentally, often using basic facts.

Original ProblemRounded Problem=EstimateOriginal \ Problem \approx Rounded \ Problem = Estimate

Examples

Book overview

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Chapter 6: Use Models and Strategies to Divide Decimals

  1. Lesson 1

    Lesson 1: Patterns for Dividing with Decimals

  2. Lesson 2Current

    Lesson 2: Estimate Decimal Quotients

  3. Lesson 3

    Lesson 3: Use Models to Divide by a 1-Digit Whole Number

  4. Lesson 4

    Lesson 4: Divide by a 2-Digit Whole Number

  5. Lesson 5

    Lesson 5: Divide by a Decimal

Lesson overview

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Section 1

Rounding to Estimate Quotients

Property

To estimate a quotient using rounding, round the dividend and the divisor to nearby whole numbers or other numbers that are easy to work with. Then, divide the rounded numbers.

a÷brounded(a)÷rounded(b)a \div b \approx \text{rounded}(a) \div \text{rounded}(b)

Examples

Section 2

Estimate Decimal Quotients Using Compatible Numbers

Property

To estimate a decimal quotient, round the dividend and divisor to compatible numbers. Compatible numbers are numbers that are close to the original numbers and are easy to compute with mentally, often using basic facts.

Original ProblemRounded Problem=EstimateOriginal \ Problem \approx Rounded \ Problem = Estimate

Examples

Book overview

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

Continue this chapter

Chapter 6: Use Models and Strategies to Divide Decimals

  1. Lesson 1

    Lesson 1: Patterns for Dividing with Decimals

  2. Lesson 2Current

    Lesson 2: Estimate Decimal Quotients

  3. Lesson 3

    Lesson 3: Use Models to Divide by a 1-Digit Whole Number

  4. Lesson 4

    Lesson 4: Divide by a 2-Digit Whole Number

  5. Lesson 5

    Lesson 5: Divide by a Decimal