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Grade 8:  The Learning Equation Math

33.01 Enlargements and Reductions

3icon.gif (4368 bytes)

Transformations

Refresher pp 72-73

Learning Outcomes:

The student will:

 

Scale Practice

Practice Scale Diagrams

scale.jpg (8519 bytes)

source:  http://www.frontiernet.net/~dcoates/scale.htm

Key Terms:

corresponding, enlargement, proportion, reduction, reduction centre, scale, scale drawing, scale factor, scale drawing, scale factor, scale ratio, scale statement, scale model

Prerequisite Skills:

Proportions:   Grade 7 Lesson 12.09

Transformations:   Grade 7 Lesson 33.02

Illustrative Examples

Using the following WHMIS symbols, have students place the original over 1 cm by 1 cm grid paper and then  enlarge it on a 3 cm by 3 cm grid paper to make a class poster.

whmis.jpg (7788 bytes)

WHMIS - An Interactive Approach

whms_grid1cm_8x7.gif (3509 bytes)

grid3cm_4x4.gif (2825 bytes)

source:  Shape and Space:  3-D Objects and 2-D Shapes
Length 10 millimeters (mm) = 1 centimeter (cm)
10 centimeters (cm) = 1 decimeter (dm)
10 decimeters (dm) = 1 meter (m)
10 meters (m) = 1 dekameter (dam)
10 dekameters (dam) = 1 hectometer (hm)
10 hectometers (hm) = 1 kilometer (km)
1 centimeter (cm) = 10 millimeters (mm)
1 meter (m) = 100 centimeters (cm) = 1,000 millimeters (mm)
1 kilometer (km) = 1,000 meters (m)
Capacity 10 milliliters (mL) = 1 centiliter (cL)
10 centiliters (cL) = 1 deciliter (dL)
10 deciliters (dL) = 1 liter (L)
10 liters (L) = 1 dekaliter (daL)
10 dekaliters (daL) = 1 hectoliter (hL)
10 hectoliters (hL) = 1 kiloliter (kL
Mass 10 milligrams (mg) = 1 centigram (cg)
10 centigrams (cg) = 1 decigram (dg)
10 decigrams (dg) = 1 gram (g)
10 grams (g) = 1 dekagram (dag)
10 dekagrams (dag) = 1 hectogram (hg)
10 hectograms (hg) = 1 kilogram (kg)
1,000 kilograms (kg) = 1 metric ton (t)

 

length km   hm   dam   m    dm   cm   mm
mass (weight) kg   hg   dag   g    dg   cg   mg
capacity (volume) kL   hL   daL   L    dL   cL   mL

The conversion rules are the same for all of these units.

  • circle the unit you are starting with

  • circle the unit you are converting to

  • count the number of units left or right and move the decimal the same number of spaces.

Example:

32.5 km = __________ cm

To get from km to cm, you are moving 5 spaces to the right.  When we move the decimal 5 decimal places to the right in 32.5 we have the following conversion:

32.5 km =  3 250 000 cm

 

UCONVERT: Units Converter (weight) - best I could find on the web

IFP : Metric Conversion Tables

Java Boutique, The Ultimate Java Applet Resource - ConversionApplet

The WWW Unit Converter

 

 

 

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