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