## Reading Rulers

#### Aligned To Common Core Standard:

**Grade 3 Measurement** - 3.MD.4

How to read a ruler? When a kid is learning about lengths and measurements, a ruler is the first length measurement tool they are introduced to. It is the most basic tool in measurement, mathematics, and geometry. It usually provides length readings in inches, centimeters, and millimeters. A metric ruler reads measurements in centimeters and millimeters. The smaller ticks on represent millimeter readings, and the longer ticks represent centimeter. There are 9 small ticks in one centimeter. Ten millimeters make up one centimeter. The line of sight is an important factor when it comes to accurately reading your measurements. The line of sight must be perpendicular to the ruler. Deviation in the angle between the line of sight and the placement of the tool will pave the way for inaccurate measurement reading. Example: Make sure that one end of the object you are measuring is coinciding the zero mark on the ruler. Keep your eye just above the ruler. Use the tip of the pencil to check the tick the end of the object is coinciding with. These worksheets will help you learn to master these skills.

### Printable Worksheets And Lessons

- Rulers Step-by-step
Lesson- We do both metric (cm, mm) and U.S. Standard (inches).

- Guided Lesson - More shenanigans with rulers. You will tell us the measure you determine for these lengths visually.

- Guided Lesson Explanation - This meant to help talk you through it. I have another with full visual directions to come.

- Colored Rulers Measurements - All different colored rulers if you would like to print in color.

- How Long In Inches Worksheet
- U.S. Standard measurement with no ruler provided.

- Measuring Sides of Geometric Shapes in Inches Worksheet - We move away from straight lines in favor of actual shapes.

- Practice Worksheet - Measure away on these. I got as many as I could on 2 pages.

- Matching Worksheet - Match the ruler and their measures. This makes for a fun way to approach this skill.

#### Homework Sheets

We use U.S. Standard and metric length measurement units here.

- Homework 1- If we measure the length by the ruler we can do this by counting the numbers on the ruler. The first measurement (a) starts at 1 and continue to 6.
- Homework 2- Centimeters are the long marks on the ruler and denoted by the numbers. One millimeter is equal to one-thousandth of a meter (0.039 in.).
- Homework 3- If we measure the length by the ruler we can do this by counting the numbers on the ruler. The first measurement (a) starts at 1 and continue to 8.

#### Practice Worksheets

Note that the measures are not lined up at the zero column. This is how students are assessed.

- Practice 1- Write the measures of each ruler below using the indicated units.
- Practice 2- Write the measures that you read as you go through this worksheet.
- Practice 3- Inches are units of linear measure that is equal to one-twelfth of a foot.