Length Unit Conversion (Easy Method)

Metric Conversion (Length)  SI to SI (Left to Right) multiply 10x 3 1 1 1 1 1 1 3 Mega Kilo Hecto Deca (Unit) Deci Centi Milli Micro (Right to Left) divide 10x How to memorize? Mega (M) Kilo (k) Hecto (h) Deca (da) Unit Deci (d) Centi (c) Milli (m) Micro (µ) My King Henry Doesn’t Usually Drink Chocolate Mango Milkshake

Example: Convert 5 km to mm 5 km = 5 x 106 mm = 5000000 mm (Left to Right) multiply 106 = 1000000 3 3 1 1 1 1 1 1 3 3 Gm Mm km hm da m (meter) dm cm mm µm nm Count Boxes = 6 = 3 = 1

Example: Convert 675 cm to m (Right to Left) divide 102 = 100 3 3 1 1 1 1 1 1 3 3 Gm Mm km hm da m (meter) dm cm mm µm nm Count Boxes = 2 675 cm = 675 / 102 m = 6.75 m

Example: Convert 675 km to µm (Left to Right) multiply 109 = 1000,000,000 3 3 1 1 1 1 1 1 3 3 Gm Mm km hm da m (meter) dm cm mm µm nm Count Boxes = 6+3=9 675 km = 675 x 109 µm

Imperial Conversion (Length) Memorize Following Basic Conversion 1 nmi = 1.15 mi 1 mi = 1760 yd 1 yd = 3 ft 1 ft = 12 inch 1 inch = 25.4 mm (Left to Right) multiply 1.15 1760 3 12 25.4 nmi mi yd ft inch mm (Right to Left) divide

Example: Convert 5.2 mi to inch 5.2 mi = 5.2 x 1760 x 3 x 12 = 329472 inch (Left to Right) multiply 1.15 1760 3 12 25.4 nmi mi yd ft inch mm

Example: Convert 86752 mm to mi (Right to Left) divide 1.15 1760 3 12 25.4 nmi mi yd ft inch mm

Example: Convert 80.6 mi to km Step1: Convert 80.6 mi to mm 80.6 mi = 80.6 x 1760 x 3 x 12 x 25.4 = 129713126.4 mm (Left to Right) multiply 1.15 1760 3 12 25.4 nmi mi yd ft inch mm

Example: Convert 80.6 mi to km Step2: Convert 129713126.4 mm to km 80.6 mi = 129713126.4 mm = 129713126.4 / 1000000= 129.713 km (Right to Left) divide 106 = 1000000 3 3 1 1 1 1 1 1 3 3 Gm Mm km hm da m (meter) dm cm mm µm nm Count Boxes = 6

Length Unit Conversion Strip (Left to Right) multiply 10x  Metric Scale (Right to Left) divide 10x  Metric Scale (Left to Right) multiply Y  Imperial Scale (Right to Left) divide Y  Imperial Scale Metric Scale 3 1 1 1 1 1 1 3 X Mm km hm Da m (m) dm cm mm µm Imperial Scale 1.15 1760 3 12 25.4 Unit Conversion Strip Y nmi mi yd ft inch mm

Exercise

Solution

Area Unit Conversion (Easy Method)

Area Area is the quantity that expresses two- dimensional figure or shape.

Example: Calculate the area of plot

Solution

Area A1

Area A2

Area A3

Area A4

Area A5

Total Area (A)

Metric Conversion (Area)  SI to SI (Left to Right) multiply 102x 3 1 1 1 1 1 1 3 Mega Kilo Hecto Deca (Unit) Deci Centi Milli Micro (Right to Left) divide 102x How to memorize? Mega (M) Kilo (k) Hecto (h) Deca (da) Unit Deci (d) Centi (c) Milli (m) Micro (µ) My King Henry Doesn’t Usually Drink Chocolate Mango Milkshake

Example: Convert 20 sq. km to sq. m (Left to Right) multiply 103x2 = 106 = 1000000 3 1 1 1 1 1 1 3 Mega Kilo Hecto Deca (m2) Deci Centi Milli Micro Count Boxes = 3 20 sq. km = 20 x 106 sq. m = 20,000,000 sq. m

Unit Conversion (Area) Memorize Following Basic Conversion 1 sq. mi = 640 ac 1 ac = 4840 sq. yd 1 sq. yd = 9 sq ft 1 sq. ft = 144 sq. inch 1 sq. inch = 645.16 mm 1 sq km = 100 ha 1 ha = 10,000 sq. m 1 ac = 0.405 ha 1 marla = 225 sq ft = 21 sq m = 25 sq yard 1 canal = 20 marla 640 4840 9 144 645.16 Sq. mi ac Sq. yd Sq. ft Sq. in Sq. mm 0.405 10,000 10.764 ac ha sq. m sq. ft 20 225 canal marla Sq. ft

Exercise