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Measuring to the Nearest Tenth

Unit 15, Lesson 2, Day 2

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DPP H

Solve the problems using mental math, base-ten pieces, or shorthand.

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Math Vocabulary Review

common fraction; fraction – any fraction that is written with a numerator and denominator that are whole numbers. For example, 3/4 and 9/4 are both common fractions.

decimal fraction; decimal – A fraction written as a decimal. For example, 0.75 and 9.4 are decimal fractions and 75/100 and 4/10 are called common fractions.

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Math Vocabulary Review

hundredth – there are one hundred hundredths in a one

tenth there are ten tenths in a one

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Math Vocabulary

nearest tenth of a centimeter – this is the tenth of a centimeter that is closest to the end of whatever you are measuring

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Essential Question

How close do measurements have to be?

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Teacher Notes – Part 2Measure Hunt

Lead a class discussion about estimating length.

Hold up a pencil and ask students to estimate its length and width. Is the width less than 2 cm. or more than 2 cm.? Is the pencil longer than 5 cm? longer than 20

cm?

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Teacher Notes – Part 2Measure Hunt

Pose similar questions for:

teacher scissors a large paper clip a small index card

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Teacher Notes – Part 2Measure Hunt

Students will work in teams of three. Each student of the team must find an object

to measure that is less than 2 cm. Each student of the team must find an object

to measure that is between 5 and 10 cm. Each student of the team must find an object

that is between 20 and 30 cm. Each student of the team must find an object

that is between 110 and 130 cm.

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Teacher Notes – Part 2Measure Hunt

DAB Pg. 239

Students record their data for Measure Hunt in the tables provided on the activity page.

In the column “Which way?” students should describe what they actually measured on an object.

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Teacher Notes – Part 2Measure Hunt

DAB Pg. 239

For example, if a student measures a desk, the student should record whether he or she measured the length, width or height.

After the teams finish, challenge them by asking to which category a square-inch tile belongs.

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Math Vocabulary Review

common fraction; fraction – any fraction that is written with a numerator and denominator that are whole numbers. For example, 3/4 and 9/4 are both common fractions.

decimal fraction; decimal – A fraction written as a decimal. For example, 0.75 and 9.4 are decimal fractions and 75/100 and 4/10 are called common fractions.

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Math Vocabulary Review

hundredth – there are one hundred hundredths in a one

tenth there are ten tenths in a one

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Essential Question

How close do measurements have to be?