Ontario Teachers' Federation



Lesson 3Topic Goal: Imperial Length Units - Estimating and Measuring-71120-21272500You have learned about the metric system, now you will learn about another measuring system called Imperial.In the imperial system there are four main units of measurement:UnitAbbreviationInchin or “Footft or ‘YardydMilemiMost of the world has adopted the Metric System. What two countries use the imperial system? Look at the map below.3657600185420Although Canada has adopted the Metric system, we still use some imperial measures on our everyday lives. For example, when someone says, “I am 5 feet 4 inches tall”, or “My backpack weighs 20 pounds”, they are using the Imperial System. 00Although Canada has adopted the Metric system, we still use some imperial measures on our everyday lives. For example, when someone says, “I am 5 feet 4 inches tall”, or “My backpack weighs 20 pounds”, they are using the Imperial System. -34290018605500-228600231140Source: Jensen, A. (2010, June 19). Know Justice. Living in the Past – The imperial System [Blog post]. Retrieved from : Jensen, A. (2010, June 19). Know Justice. Living in the Past – The imperial System [Blog post]. Retrieved from Example(s): -65405-22415500The following are some examples of what each measurement might look like.An inch about equal to the distance from the tip of your thumb to its knuckle.For the average sized teenager, one foot is a little bit longer than the distance from the tip of your elbow to your wrist.A lamb is about a yard tall732790-6350Five and a half times around soccer field is approximately a mile.A - Key Conversions lengths and the Imperial system114300183515There are 12 inches in one footThere are 3 feet in one yardThere are 1760 yards in one mile00There are 12 inches in one footThere are 3 feet in one yardThere are 1760 yards in one mile1. Choose the best measure of the following objects:The length of a pen7 inchesb. 16 inchesc. 51 inchesAnswer: The length of a pen is approximately 7 inches long.The height of the basketball rim 5 feetb. 10 feetc. 100 feetAnswer: A basketball rim us 10 feet highThe height of a toddler1 yardb. 6 yardsc. 0.2 yardsAnswer: A toddler is approximately 1 yard tall.B - Using a ruler 91440033337500This is what one inch of an Imperial ruler looks like:1. Name the fraction of an inch shown be each arrow 365760013970Answers:1/8”1/4”1/2”3/4”00Answers:1/8”1/4”1/2”3/4”1943100516255d00d1485900516255c00c1028700516255b00ba2. Using a ruler, measure the length of the objects below as shown by the arrows4800600819150022860000032004008191500165100000a. b. ____________________________________________________Answer: 1 ?”Answer: 2 ?” Practice Questions: -66040-42799000Choose the best measure for each of the following objects:Length of an adult forearm25 in 13 ft1 miWidth of a car24 ft150 ft9ftLength of a binder3 in11 in52 inThickness of a pen2 in4 in1/8 inDistance of a marathon26 mi2 mi2600 mi57150022860000Write the fraction of an inch shown by each arrow.205740059055c00c148590059055b00b80010059055a00a________________________Estimate, and then use a ruler to measure the length of the objects below as shown by the arrows. 2857500255270Estimate ________0Estimate ________2971800451485Actual ________0Actual ________2171700186690091440018669000a. 20574000Estimate ________0Estimate ________1371600-1143000571500-22860000b. 2171700248285Actual ________0Actual ________571500233045002171700252730Estimate ________0Estimate ________C. 2171700177800Actual ________0Actual ________571500153035003543300207645Estimate ________0Estimate ________d.3543300391160Actual ________0Actual ________11430097345500 Assessment: -66040-43053000Choose the best measure for each of the following objects: Length of an adult foot10 in 13 ft1 miWidth of a door36 ft36 ft36 ydHeight of a toddler3 in1 ft1 ydLength of a hockey stick80 in80 ft80 ydDistance of your home to school78 mi3 mi1390 mi57150022860000Write the fraction of an inch shown by each arrow. 205740059055c00c148590059055b00b80010059055a00a________________________Estimate, and then use a ruler to measure the length of the objects below as shown by the arrows. 800100163830002857500255270Estimate ________0Estimate ________800100474345002971800451485Actual ________0Actual ________a.17145002286000 57150000020574000Estimate ________0Estimate ________b. 2171700248285Actual ________0Actual ________685800293370002171700252730Estimate ________0Estimate ________C. 2171700177800Actual ________0Actual ________1143000138430004572002076450045720093345003543300207645Estimate ________0Estimate ________d.3543300391160Actual ________0Actual ________ ................
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