Understanding Customary Units of Measure

Transcription

1 Practice A What unit of measure provides the best estimate? Explain. 1. A paper clip is about 1 long because it is about as long as 2. A desk is about 3 long because it is about 3 times 3. A pair of scissors weighs about 4 because it has a weight of about 4 4. A dictionary weighs about 5 because it has a weight of about 5 5. A mug holds about 1 because it holds about 1 6. Marcia filled her kitchen sink with water. What benchmark should she use for the capacity of the sink? 7. Use a ruler to measure the length of the nail to the nearest half, fourth, or eighth inch.

2 Practice B What unit of measure provides the best estimate? Explain. 1. A pair of eyeglasses is about 5 long because 2. A chalkboard is about 4 long because 3. A bottle of shampoo weighs about 12 because 4. A cat weighs about 8 because 5. An eyedropper holds about 2 because 6. Ramon filled a watering can with water. What benchmark should he use for the capacity of the watering can? 7. Use a ruler to measure the length of the feather to the nearest half, fourth, or eighth inch.

3 Practice C What unit of measure provides the best estimate? Explain. 1. A new crayon is about 4 long because 2. A computer weighs about 15 because 3. A bottle of bubble bath holds about 18 because Use benchmarks to estimate each measure. 4. the width of your calculator 5. the capacity of a small aquarium 6. Jenna wants to weigh a watermelon. What benchmark should she use for the weight of the watermelon? 7. Use a ruler to measure the length of the pen to the nearest half, fourth, or eighth inch.

4 Review for Mastery The customary system of measurement uses inches, feet, yards, and miles to measure length, width, distance, and height. Use inches to measure objects that are a few widths of your thumb. Use feet to measure objects that are a few times the distance from your shoulder to your elbow. Use yards to measure objects that are a few widths of a classroom door. Use miles to measure distances that are a few times the lengths of 18 football fields. Write inches, feet, yards, or miles. 1. Your hand is about 3 wide. 2. A grown man is about 2 tall. The customary system of measurement uses ounces, pounds, and tons to measure weight. Use ounces to measure objects that weigh as much as a few slices of bread. Use pounds to measure objects that weigh as much as a few loaves of bread. Use tons to measure objects that weigh as much as a few small cars. Write ounces, pounds, or tons. 3. A feather weighs about A hippo weighs about 4. The customary system of measurement uses fluid ounces, cups, pints, quarts, and gallons to measure capacity. Use fluid ounces to measure objects that have a capacity of a few spoonfuls. Use cups to measure objects that have a capacity of a few glasses of juice. Use pints to measure objects that have a capacity of a few small bottles of salad dressing. Use quarts to measure objects that have a capacity of a few small containers of paint. Use gallons to measure objects that have a capacity of a few large containers of milk. Write fluid ounces, cups, pints, quarts, or gallons. 5. Two teaspoons hold about Five mugs hold about 5.

5 Challenge Customary Classroom Challenge Find objects in your classroom for each unit of measure. Estimate first. Then measure. LENGTH, WIDTH, OR HEIGHT Object Estimate Actual inches inches feet feet yards yards inches inches feet feet yards yards WEIGHT Object Estimate Actual ounces ounces ounces ounces pounds pounds pounds pounds CAPACITY Object Estimate Actual fluid ounces fluid ounces cups cups pints pints quarts quarts

6 Problem Solving Use customary units of measure to answer each question. 1. Which unit of measure would be capacity of a swimming pool? 2. Which unit of measure would be length of an insect? 3. Which unit of measure would be weight of a television set? 5. Which unit of measure would be distance between two cities? Circle the letter of the correct answer. 7. How long is a desk? A about 4 in. B about 4 ft C about 4 yd D about 4 mi 9. How much does a can of soda hold? A about 1 glass of juice B about 4 small bottles of salad dressing C about 8 large containers of milk D about 10 spoonfuls 4. Which unit of measure would be weight of a feather? 6. Which unit of measure would be capacity of a can of soup? 8. How much does a bird weigh? F about 3 oz G about 3 lb H about 3 T J about 30 T 10. How long is your math book? F about 3 times the distance from your shoulder to your elbow G about 5 times the width of a classroom door H about 8 times the total length of 18 football fields J about 12 times the width of your thumb

7 Reading Strategies Using a Graphic Organizer This graphic organizer will help you learn about the customary units of measure. Length inch (width of thumb) foot (distance from shoulder to elbow) yard (width of classroom door) mile (total length of 18 football fields) Customary Units of Measure Weight ounce (slice of bread) pound (loaf of bread) ton (small car) Capacity fluid ounce (spoonful) cup (glass of juice) pint (small bottle of salad dressing) quart (small container of paint) gallon (large container of milk) Use the graphic organizer to answer each question. 1. Which unit of length is the shortest? 2. Which unit of weight is lighter than a ton but heavier than an ounce? 3. Which unit of capacity is the greatest? 4. Which unit of length is about as long as the distance from your shoulder to your elbow? 5. Which unit of capacity is about the capacity of a small bottle of salad dressing? 6. Which unit of weight is about the weight of a small car?

8 Puzzles, Twisters & Teasers A Whale of a Time! Answer each question below and circle the letter next to the correct answer. Write the letters over the number of the problem in the corresponding space in the riddle. 1. Which unit would you use for the height of a sixth-grade student? X yard B inch P mile 2. Which unit would you use for the weight of a peach? L ounce S ton F pound 3. Which unit would you use for the capacity of a bathtub? A fluid ounce U gallon M cup 4. Which unit would you use for the distance between New York and Miami? O foot C inch B mile 5. Which unit would you use for the length of a nail? B inch D yard E mile 6. Which unit would you use for the weight of a truck? E ton R ounce A pound 7. Which unit would you use for the width of a cell phone? W yard V foot R inch 8. Which unit would you use for the weight of a television set? Q ton G pound T ounce 9. Which unit would you use for the capacity of a water glass? I quart X gallon U cup 10. Which unit would you use for the distance between your eyes? H mile M inch J yard What do whales like to chew?

9 Answers LESSON Practice A Possible answers are given 1. inch; the width of my thumb 2. feet; the distance from my shoulder to my elbow 3. ounces; slices of bread 4. pounds; loaves of bread 5. cup; glass of juice 6. a large container of milk inches Practice B Possible answers are given. 1. inches; they are about 5 times the width of my thumb 2. yards; it is about 4 times the width of a classroom door 3. ounces; it has a weight of about 12 slices of bread 4. pounds; it has a weight of about 8 loaves of bread 5. fluid ounces; it holds about 2 spoonfuls 6. a large container of milk 7. 4 inches Practice C Possible answers are given. 1. inches ; it is about 4 times the width of my thumb 2. pounds; it has a weight of about 15 loaves of bread 3. fluid ounces; it holds about 18 spoonfuls CODE about 3 times the width of my thumb 5. about 7 large containers of milk 6. a loaf of bread inches Review for Mastery 1. inches 2. yards 3. ounces 4. tons 5. fluid ounces 6. cups Challenge Check students work. Objects and estimates will vary. Problem Solving 1. gallons 2. inches 3. pounds 4. ounces 5. miles 6. cups 7. B 8. F 9. A 10. J Reading Strategies 1. inch 2. pound 3. gallon 4. foot 5. pint 6. ton Puzzles, Twisters & Teasers 1. B 2. L 3. U 4. B 5. B 6. E 7. R 8. G 9. U 10. M B L U B B E R G U M