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Dinosaur Dig: Why Do the Numbers Change?

Grade 2 practice measuring dinosaur fossils with inch and centimeter rulers and explaining how the size of the unit changes the number.

Grade 2MathInteractive · Printable

Aligned to2.MD.A.2

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What’s included

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

Details

Format: Interactive · Printable
Grade: Grade 2
Subject: Math
Question types: Fill in the blank, Multiple choice, Sorting, Short answer

About this worksheet

What students practice

Students measure the same fossil in inches and in centimeters with a ruler.
Students explain that a longer unit gives a smaller number of units for the same length.
Students order units by size and predict which unit will give the bigger number.

How to use

Show one inch and one centimeter on a real ruler before starting. After Part 1, have students measure a pencil both ways and tell a partner why the two numbers are different.

Curriculum