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UNIT 2UNIT 2Reading Measuring ToolsReading Measuring Tools
Read in both English & Metric rules & Read in both English & Metric rules & tapestapes
Convert between English & Metric unitsConvert between English & Metric units
Page 19Page 19
Learning ObjectivesLearning Objectives
Fractional RuleFractional Rule major divisionsmajor divisions
– feetfeet– inchesinches– fractions:fractions:
» 1/2 = 2 per inch1/2 = 2 per inch» 1/4 = 4 per inch1/4 = 4 per inch» 1/8 = 8 per inch1/8 = 8 per inch» 1/16 = 16 per inch (usually the smallest1/16 = 16 per inch (usually the smallest
division needed) division needed)
UNIT 2page 19 - 20
UNIT 2page 19 - 20
Fractional RuleFractional Rule
7 1/2”7 1/2” 8 5/8”8 5/8” 1’ - 0 5/16”1’ - 0 5/16”
Reading Reading Fractional RuleFractional Rule
take 5 minutes to complete the take 5 minutes to complete the measurements measurements A thru H A thru H in Activity 2-1 on in Activity 2-1 on page 20page 20
UNIT 2page 20UNIT 2
page 20
Metric RuleMetric Rule
basic unit - meterbasic unit - meter
– millimillimetermeter mmmm 1/1000 m1/1000 m– centicentimetermeter cmcm 1/100 m1/100 m– kilokilometermeter kmkm 1000 m 1000 m
UNIT 2page 20UNIT 2
page 20
Metric RuleMetric Rule
1”
25.4mm20mm20mm 38mm38mm 115 mm115 mm
11.5 cm11.5 cm
Conversion of UnitsConversion of UnitsEnglish to MetricEnglish to Metric
1 inch
12 inches
1 yard ( 36 inches )
39.37 inches
1 inch
12 inches
1 yard ( 36 inches )
39.37 inches
25.4 millimeters
304.8 millimeters
914.4 millimeters
1000 millimeters
25.4 millimeters
304.8 millimeters
914.4 millimeters
1000 millimeters
UNIT 2page 20UNIT 2
page 20
Example ConversionExample Conversion
convert convert 14 inches14 inches to to millimetersmillimeters
UNIT 2page 20UNIT 2
page 20
solution:multiply 25.4 x 14 = 355.6 mmsolution:multiply 25.4 x 14 = 355.6 mm
Example ConversionExample Conversion
convert convert 11’-5”11’-5” to to metricmetricconvert convert 11’-5”11’-5” to to metricmetric
UNIT 2page 21UNIT 2
page 21
solution:(11’ x 12”) + 5” = 137”137” x 25.4 = 3479.8 mm3479.8 mm = 3.48m 1000
solution:(11’ x 12”) + 5” = 137”137” x 25.4 = 3479.8 mm3479.8 mm = 3.48m 1000
Example ConversionExample Conversion
convert convert 225 mm225 mm to to inchesinchesconvert convert 225 mm225 mm to to inchesinches
UNIT 2page 21UNIT 2
page 21
solution:225 ÷ 25.4 = 8.86” or 8 7/8”solution:225 ÷ 25.4 = 8.86” or 8 7/8”
Example ConversionExample ConversionUNIT 2
page 21UNIT 2
page 21
convert convert 23.45 m23.45 m to to customary unitscustomary unitsconvert convert 23.45 m23.45 m to to customary unitscustomary units
solution:23.45 m = 23,450 mm23,450 mm ÷ 25.4 = 923.23”912” = 76’-11.23” or 76’-11 1/4”
(nearest 1/8”)
solution:23.45 m = 23,450 mm23,450 mm ÷ 25.4 = 923.23”912” = 76’-11.23” or 76’-11 1/4”
(nearest 1/8”)
take 10 minutes to complete Activity 2-2 page 21 &
test your knowledge on page 22
take 10 minutes to complete Activity 2-2 page 21 &
test your knowledge on page 22
END OF UNIT 2END OF UNIT 2
UNIT 2UNIT 2
Reading a Metric RuleReading a Metric Rule
Test Your KnowledgeTest Your Knowledge