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Community Science Lab: Decimal Evidence worksheet preview

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Community Science Lab: Decimal Evidence

Convert rational numbers to exact decimals and use long-division remainders to identify terminating and repeating water-quality records.

Grade 7MathInteractive · Printable

Aligned to7.NS.A.2.d

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What’s included

  • Single worksheet
  • Auto-graded online
  • 1 Common Core standard
  • Printable answer key
  • 14 questions
  • Classroom-ready

Details

Format
Interactive · Printable
Grade
Grade 7
Subject
Math
Question types
Fill in the blank, Multiple choice, Circle the answer, Short answer

About this worksheet

What students practice

  • Students use long division to convert positive and negative rational numbers to decimals.
  • Students use remainders to distinguish terminating decimals from repeating decimals.
  • Students choose exact decimal records for water-quality measurements.

How to use

Have students show long division on separate paper. Review how a zero remainder ends a decimal and how a repeated nonzero remainder establishes a repeating block.

Curriculum

Common Core standard covered

7.NS.A.2.d

Change a rational number to a decimal with long division and know the decimal either ends or repeats.

Preview

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Name Date

Community Science Lab: Decimal Evidence

Use long division to record water-quality measurements exactly.

Prepare Decimal Records

Use long division and show your work on separate paper. Do not round. Parentheses mark a repeating block: 0.2(17) means 0.2171717… .

1.
A community science lab uses 3/25 liter of water for a test. Complete the missing entries in this long-division record.
Dividing 3 by 25
Decimal placeAmount to divideQuotient digitRemainder
Tenths3015
Hundredths50??

Hundredths digit:  . Final remainder:  .

2.
A dissolved-oxygen reading needs a signed correction of −7/50 mg/L. Convert the correction to an exact decimal.

Signed correction:   mg/L

3.
A bottle contains 23/20 liters of water collected for testing. Use long division to write the volume as an exact decimal.

Volume:   L

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