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Good Afternoon!

Good Afternoon!. Today we will be learning about Customary units of length. Let’s warm up :. Add :. 1) 4 + 3 7 7. 2) 7 + 1 10 5. Subtract :. 3) 15 - 7 9 9. 4) 1 - 1 2 6.

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Good Afternoon!

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  1. Good Afternoon! Today we will be learning about Customary units of length Let’s warm up : Add: 1) 4 + 3 7 7 2) 7 + 1 10 5 Subtract: 3) 15 - 7 9 9 4) 1 - 1 2 6 CONFIDENTIAAL

  2. Today we will learn about the Customary units of measure for length. The system of measurement used in the United States is called theCustomary systemof measurement. Customary units of measurement are the non-standard units. Non-standard units of measure give approximate dimensions of an object. Like, we can say that: The desk is as long as 6 of my hands. CONFIDENTIAAL

  3. Try This! • Use your hands to find the length of the computer Table. • Use your palm to find the length of your book. CONFIDENTIAAL

  4. History Let us see the history of discovery of units of measurement. The Egyptians have evidence that proves that they may be the earliest civilization that discovered a standard unit for length. The Greeks used the width of 16 fingers to find one foot. CONFIDENTIAAL

  5. The Romans adopted the foot from the Greeks and divided it into 12 sections which was calledUNICAE, which came to be known as aninch. The yard was adopted by King Henry I in the 12th century. Many years ago, the US accepted this standard of measurement from London into our customary system. CONFIDENTIAAL

  6. Everyday objects are used as units of measure. It can be used to measure length, height and width. LENGTH: is a measure how long something is from end to end. • For example: • The length of my arm is 18 inches. CONFIDENTIAAL

  7. HEIGHT: The measurement of distance from bottom to top. • For example: • Her height is 68 inches. WIDTH: The measurement of distance from side to side. • For example: • The width of the stripe is 2 inches. CONFIDENTIAAL

  8. Explore Customary Length to ¼ inch. • An inch (in.) is used to measure short lengths in the customary system. • You can use a ruler, yardstick or tape to measure in inches. STEP 1: Place the ruler against one edge of the object. Line up the zero on the ruler with one end of the object. CRAYON CONFIDENTIAAL

  9. STEP 2: Measure the object to the closest inch. Use half-inch marks to help you decide which inch mark is closest to the end of the object. CRAYON STEP 3: Measure the object to the closest half-inch. Use quarter-inch marks to help you decide which half-inch mark is closest to the end of the object. CRAYON CONFIDENTIAAL

  10. STEP 4: Measure the object to the closest inch. Use the eight-inch marks to help you decide which quarter-inch mark is closest to the end of the object. CRAYON CONFIDENTIAAL

  11. The foot (ft) and yard (yd) are used to measure larger units in the customary system. 1 yd 1 ft CONFIDENTIAAL

  12. When measuring length in the customary system the common units used are inches, feet, yards, and miles. From smallest to greatest length measurements are compared as: People use "feet" to measure their height. CONFIDENTIAAL

  13. The units of measure in the customary system are: Customary System CONFIDENTIAAL

  14. Try This! • Measure the length of a book. • Measure the length of a pen. CONFIDENTIAAL

  15. BREAK CONFIDENTIAAL

  16. CONFIDENTIAAL

  17. Assignment Use your hands to find the length of the Dining Table. Use your palm to find the length of your keyboard. CONFIDENTIAAL

  18. Use your hands to find the length of the bicycle. Use your palm to find the length of your school bag. CONFIDENTIAAL

  19. Find the length of the following arrows in inches: 5) 6) 7) CONFIDENTIAAL

  20. Find the length of the following lines in inches: 8) 9) 10) CONFIDENTIAAL

  21. Very Good! Let's Review The system of measurement used in the United States is called theCustomary systemof measurement. Customary units of measurement are the non-standard units. Non-standard units of measure give approximate dimensions of an object. Like, we can say that: The desk is as long as 6 of my hands. CONFIDENTIAAL

  22. Review Everyday objects are used as units of measure. LENGTH: is a measure how long something is from end to end. • For example: • The length of my arm is 18 inches. HEIGHT: The measurement of distance from bottom to top. • For example: • Her height is 68 inches. WIDTH: The measurement of distance from side to side. • For example: • The width of the stripe is 2 inches. PERIMETER: is the distance around a figure and is computed by adding the lengths of the figure's sides. CONFIDENTIAAL

  23. Review Explore Customary Length to ¼ inch. • An inch (in.) is used to measure short lengths in the customary system. • You can use a ruler, yardstick or tape to measure in inches. STEP 1: Place the ruler against one edge of the object. Line up the zero on the ruler with one end of the object. CRAYON CONFIDENTIAAL

  24. Review STEP 2: Measure the object to the closest inch. Use half-inch marks to help you decide which inch mark is closest to the end of the object. CRAYON STEP 3: Measure the object to the closest half-inch. Use quarter-inch marks to help you decide which half-inch mark is closest to the end of the object. CRAYON CONFIDENTIAAL

  25. Review STEP 4: Measure the object to the closest inch. Use the eight-inch marks to help you decide which quarter-inch mark is closest to the end of the object. CRAYON CONFIDENTIAAL

  26. Review When measuring length in the customary system the common units used are inches, feet, yards, and miles. From smallest to greatest length measurements are compared as: People use "feet" to measure their height. Customary System CONFIDENTIAAL

  27. You have done a nice job. See you in the next session. CONFIDENTIAAL

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