Q1: Which unit would be best to estimate the length of a pencil? (a) Inches (b) Miles (c) Feet (d) Yards
Solution:
Ans: (a) Explanation: A pencil is a small object, so we use a smaller unit like inches. Miles, feet, and yards are too large for measuring small objects like pencils.
Q2: About how long is a school bus? (a) 10 inches (b) 10 feet (c) 40 feet (d) 40 inches
Solution:
Ans: (c) Explanation: A school bus is a very long vehicle. It is about 40 feet long. 10 inches and 40 inches are too short. 10 feet would be too short for a bus.
Q3: A marker is about 6 inches long. How many markers placed end-to-end would be about 1 foot? (a) 1 (b) 2 (c) 6 (d) 12
Solution:
Ans: (b) Explanation: There are 12 inches in 1 foot. If one marker is 6 inches, then \(12 \div 6 = 2\) markers would equal 1 foot.
Q4: Which is the best estimate for the height of a doorway? (a) 7 inches (b) 7 feet (c) 7 yards (d) 7 miles
Solution:
Ans: (b) Explanation: A doorway is tall enough for people to walk through. The best estimate is 7 feet. 7 inches is too short, and 7 yards or 7 miles are too long.
Q5: Emma estimated that her desk is about 3 feet long. Which measurement is closest to 3 feet? (a) 30 inches (b) 36 inches (c) 12 inches (d) 48 inches
Solution:
Ans: (b) Explanation: Since 1 foot = 12 inches, then \(3 \times 12 = 36\) inches. So 36 inches is exactly equal to 3 feet.
Q6: Which object would you measure in yards? (a) The length of a crayon (b) The width of a book (c) The length of a playground (d) The width of your finger
Solution:
Ans: (c) Explanation:Yards are used to measure longer distances. A playground is large, so we would use yards. Crayons, books, and fingers are small objects measured in inches.
Q7: About how wide is your hand? (a) 3 inches (b) 3 feet (c) 3 yards (d) 3 miles
Solution:
Ans: (a) Explanation: A hand is a small body part. The best estimate is about 3 inches wide. 3 feet, 3 yards, and 3 miles are all much too large.
Ans: (a) Explanation: The correct conversion is 1 yard = 3 feet. Also, 1 foot = 12 inches and 1 yard = 36 inches, but options (b), (c), and (d) show incorrect relationships.
## Section B: Fill in the Blanks Q9:When estimating length, we use a __________ to help us make a reasonable guess.
Solution:
Ans: benchmark (or reference point) Explanation: A benchmark is a familiar measurement that helps us estimate lengths of other objects, like knowing your finger is about 1 inch wide.
Q10:There are __________ inches in 1 foot.
Solution:
Ans: 12 Explanation: This is a basic measurement conversion. 1 foot equals 12 inches.
Q11:There are __________ feet in 1 yard.
Solution:
Ans: 3 Explanation: The standard conversion is 1 yard = 3 feet. This is important for converting between yards and feet.
Q12:The length of a car would best be measured in __________ rather than inches.
Solution:
Ans: feet (or yards) Explanation: A car is a large object. It is more practical to measure it in feet or yards because using inches would give a very large number.
Q13:To estimate means to make a __________ guess about a measurement.
Solution:
Ans: reasonable (or close, good) Explanation:Estimating means making a reasonable guess that is close to the actual measurement, not an exact measurement.
Q14:A good benchmark for 1 inch is the width of your __________.
Solution:
Ans: thumb (or finger) Explanation: Many people's thumbs are about 1 inch wide at the widest part. This helps when estimating small lengths without a ruler.
## Section C: Word Problems Q15:Michael wants to estimate the length of his bedroom. He knows that one of his steps is about 2 feet long. He walks 6 steps across his bedroom. About how long is his bedroom?
Solution:
Ans: Step-by-step solution: Each step = 2 feet Number of steps = 6 Total length = \(6 \times 2 = 12\) feet Final Answer: 12 feet
Q16:Sarah is estimating the length of her kitchen table. She uses her hand, which is 4 inches wide. She places her hand across the table 9 times. About how many inches long is the table?
Solution:
Ans: Step-by-step solution: Each hand width = 4 inches Number of hand widths = 9 Total length = \(9 \times 4 = 36\) inches Final Answer: 36 inches
Q17:A basketball court is 84 feet long. The coach wants to estimate this length in yards. About how many yards long is the basketball court?
Solution:
Ans: Step-by-step solution: Length = 84 feet 1 yard = 3 feet Number of yards = \(84 \div 3 = 28\) yards Final Answer: 28 yards
Q18:Jenny estimated that her garden fence is 5 yards long. How many feet long is the fence?
Q19:Mr. Lee wants to estimate the distance from his classroom door to the water fountain. He walks 25 feet. A good estimate would be that this distance is about how many yards?
Solution:
Ans: Step-by-step solution: Distance = 25 feet 1 yard = 3 feet Number of yards = \(25 \div 3 \approx 8.3\) yards Rounding to a reasonable estimate: about 8 yards Final Answer: About 8 yards
Q20:A ribbon is 48 inches long. Lisa wants to estimate how many feet of ribbon she has. About how many feet long is the ribbon?
Solution:
Ans: Step-by-step solution: Length = 48 inches 1 foot = 12 inches Number of feet = \(48 \div 12 = 4\) feet Final Answer: 4 feet
The document Worksheet (with Solutions): Estimating Length is a part of the Grade 4 Course Math Grade 4.
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