Measurement and Data

Geometry Measurement

In Fourth Grade, students learn about Geometric Measurement.

They are taught to understand Concepts of Angles, and learn how to Measure Angles with a Protractor.

Have your child check out the reference sheets and videos below to help them learn about Geometric Measurement!

Practice Measuring Angles with a Protractor on the following Websites:https://www.mathplayground.com/measuringangles.html,http://mrnussbaum.com/protractor/,andhttp://www.amblesideprimary.com/ambleweb/mentalmaths/protractor.htmlHave fun!

Area and Perimeter

In Fourth Grade, students also learn about Area and Perimeter.

They are taught to find the Area and Perimeter of Rectangles.

They are also taught to find the Length of a Missing Side on a Rectangle when given the Area or Perimeter and the Length of the Other Side.

Have your child check out the reference sheets and videos below

to help them learn about Area and Perimeter of Rectangles!

AREA means the whole inside of a figure. To find the Area of a Rectangle, you would multiply the length by the width. The formula for finding the Area of a Rectangle is: Area = Length X Width. You label Area in Units Squared. In the real world, you will need to find the area of a wall that you want to paint, a floor that you want to put a carpet on, or a garden that you want to plant.
PERIMETER means the whole outside of a figure. To find the Perimeter of a Rectangle, you would add up all of the sides. The formula for finding the Perimeter of a Rectangle is: Perimeter = Length + Width + Length + Width. You label Perimeter in Units. In the real world, you will need to find the perimeter of a garden that you want to put a fence around, a yard that you want to build a fence around, or the outside of a card that you want to put a ribbon around.

For Example: When given an 8 foot by 4 foot rectangle. A = 8 X 4, so A = 32 square feet. P = 8 + 4 + 8 + 4, so P = 24 feet.When given a 14 inch by 6 inch rectangle. A = 14 X 6, so A = 84 square inches. P = 14 + 6 + 14 + 6, so P = 45 inches.

Practice finding the Area and Perimeter of Rectangles on the following Websites:https://www.mathplayground.com/area_perimeter.html,andhttps://www.splashmath.com/area-and-perimeter-games-for-4th-graders,

Finding the Length of a Missing Side on a Rectangle when given the Area or Perimeter and the Length of the Other Side...

For Example: When given an 8 foot by ? foot rectangle with an Area of 32 square feet. A = 8 X ?, so 32 = 8 X ?, so the missing side is 4 feet.When given an 8 foot by ? foot rectangle with a Perimeter of 24 feet. P = 8 + ? + 8 + ?, so 24 = 8 + ? + 8 + ?, so the missing side is 4 feet.

Practice finding the Length of a Missing Side on a Rectangle when given the Area or Perimeter and the Length of the Other Side on the following Website:https://www.khanacademy.org/math/basic-geo/basic-geo-area-and-perimeter/area-formula-intuition/e/find-a-missing-side-length-when-given-area-of-a-rectangle.Have fun!

Elapsed Time

In Fourth Grade, students also learn about Elapsed Time. Students are taught to use an open number line or "Time Line", to help them solve the three different types of elapsed time problems that they will come across in the real world.Have your child check out the reference sheets and video belowto help them learn about Elapsed Time!

1st - Students are taught to find the amount of time that has passed when given the start and end times.
For Example: Math class begins at 8:45 am and ends at 10:15 am. How long is Math class?

2nd - Students are taught to find the end time when given the start time and the amount of time that has passed.
For Example: Math class begins at 8:45 am and lasts for 1 hour and 30 minutes. What time does Math class end?

3rd - Students are taught to find the start time when given the end time and the amount of time that has passed.
For Example: Math class ends at 10:15 am and lasts for 1 hour and 30 minutes. What time does Math class start?

Conversions

In Fourth Grade, students also learn how to Convert between Units of Time, Customary Measurements, and Metric Measurements.
They learn to Multiply to get from a Big Unit to a Small Unit.
Have your child check out the reference sheets belowto help them learn about Conversions!

The Customary System of Measurement:

Customary System of Measurement (Length):
- - - 12 inches = 1 foot
    - 3 feet = 1 yard
    - 1,760 yards = 1 mile

Customary System of Measurement (Mass; Weight):
- - - 16 ounces = 1 pound
    - 2,000 pounds = 1 Ton

Customary System of Measurement (Capacity; Volume):
- - - 4 Quarts = 1 Gallon
    - 2 Pints = 1 Quart
    - 2 Cups = 1 Pint
    - 8 Fluid Ounces = 1 Cup

The Metric System of Measurement:Base Unit for Length = MetersBase Unit for Mass; Weight = GramsBase Unit for Capacity; Volume = Liters

Metric System of Measurement (Length):
- - 1 Kilometer = 1,000 Meters
  - 1 Meter = 100 Centimeters

Metric System of Measurement (Mass; Weight):
- - 1 Kilogram = 1,000 grams

Metric System of Measurement (Capacity; Volume):
- - 1 Liter = 1,000 Milliliters

This is the diagram we use to help students remember the capacity conversions within the customary measurement system.

Time:

- - - 1 hour = 60 minutes
    - 1 minute = 60 seconds

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