Grade 9 · Math · Algebra 1

9th grade Precision and greatest possible error in a measurement worksheet

6 printable versionsBuilding Confidence10 questions · answer keyFree · no account

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Precision and greatest possible error in a measurement

Grade 9 Math Worksheet - Building Confidence

NameDate

Circle the best answer, or write your answer on the line.

1.
Ari measures a crayon with a ruler and reads 12.5 cm. What is the smallest mark on the tool?
- 0.1 cm
- 10 cm
- 1 cm
- 0.01 cm
2.
Bo measures a ladder with a tape and reads 3.40 m. What is the smallest mark on the tool?
- 0.01 m
- 1 m
- 0.1 m
- 0.001 m
3.
Esme times a race with a stopwatch and reads 8.0 s. What is the smallest mark on the tool?
- 1 s
- 0.1 s
- 10 s
- 0.01 s
4.
Jun weighs a backpack on a scale and reads 7.25 kg. What is the smallest mark on the tool?
- 0.001 kg
- 0.1 kg
- 0.01 kg
- 1 kg
Kira's kitchen scale is marked every 2 g. The greatest possible error is half of the smallest mark. What is it?
Luz's bathroom scale is marked every 0.5 kg. The greatest possible error is half of the smallest mark. What is it?
Milo's measuring cup is marked every 10 mL. The greatest possible error is half of the smallest mark. What is it?
Pia measures a spoon with a ruler as 15 cm, to the nearest cm. The greatest possible error is 0.5 cm. What is the smallest the true amount could be?
Ren measures a rug with a tape as 3.4 m, to the nearest tenth. The greatest possible error is 0.05 m. What is the smallest the true amount could be?
Tala weighs a lemon on a scale as 120 g, to the nearest 10 g. The greatest possible error is 5 g. What is the smallest the true amount could be?

Precision and greatest possible error. Every version has 10 questions, and the answer key prints on the second page.

I can read the smallest mark from a measurement like 3.40 m and give the greatest possible error (half of it).
I can give the smallest and largest amount a measurement could be, and the largest area or volume.
I can say which of two measurements is more precise.

Standard: N-Q.A.3

precision: How small the smallest mark of the measuring tool is.

smallest mark: The smallest unit the tool shows, like 0.1 cm.

greatest possible error: Half of the smallest mark.

to the nearest: The measurement is rounded to the smallest mark.

bounds: The smallest and largest amounts a measurement could be.

Your child named the whole-number part as the smallest mark.

Your child ignored a zero at the end of a measurement.

Your child used the whole smallest mark as the error.

Ask: what do the digits after the point tell you?

Ask: does 3.40 m tell you more than 3.4 m?

Ask: is the error half of the smallest mark or all of it?

What is the most common mistake with precision and greatest possible error in a measurement?

Your child named the whole-number part as the smallest mark.

How can I help my child with precision and greatest possible error in a measurement?

Ask: what do the digits after the point tell you?

Are these 9th grade math worksheets free to print?

Yes. All 6 printable versions at each level are free to print, with the answer key, and no account is needed.

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