# 2.3 Measuring Length

## Unit Goals

• Students measure and estimate lengths in standard units and solve measurement story problems within 100.

### Section A Goals

• Measure length in centimeters and meters.
• Represent and solve one-step story problems within 100.

### Section B Goals

• Measure length in feet and inches.
• Represent and solve one- and two-step story problems within 100.

### Section C Goals

• Represent numerical data on a line plot.

### Glossary Entries

• bar graph
A way to show how many in each group or category using the length of rectangles.

• centimeter

A length unit in the metric measurement system. There are 100 centimeters in a meter.

• compose
To make a new unit from 10 of the next smallest unit. For example, compose a ten from 10 ones.

• data
Information about the things or people in a group.

Example: If you have a box of colored pencils, then the lengths and colors of each of the pencils are data about the pencils in the box.

• decompose
To break a unit into 10 of the next smallest unit.  For example, decompose a ten into 10 ones.

• foot

A length unit in the U.S. customary measurement system.

There are 12 inches in a foot.

• inch

A length unit in the U.S. customary measurement system.

There are 12 inches in a foot.

• line plot
A way to show how many of each measurement using an x for each measurement.

• meter

A length unit in the metric measurement system.

There are 100 centimeters in a meter.

• picture graph
A way to show how many in each group or category using pictures of the objects or symbols.