How to work out scale
Learn how to scale drawings up and down to change the size of items. Follow step-by-step instructions with illustrations, such as scaling up by doubling the size and scaling down by halving it. Understand the concept of grid squares and how to apply multiplication and division in determining new sizes accurately.
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Presentation Transcript
How to work out scale Scaling activity to change the size of items
Step 1 Step 1 - - Scaling up Scaling up Draw the fish into the large grid so it is twice the size. The small grid squares are 15 mm tall. The large grid squares are as tall as two of the small grid squares: 15 mm + 15 mm = 30 mm We could work also work this out using multiplication: 2 15 mm = 30 mm
Draw the Fish Draw the Fish - - Scaling up Scaling up
Step 2 Step 2 - - Scaling down Scaling down Draw the mouse into the smaller grid so it is half its size. The large grid squares are 30 mm tall. The small grid squares are half as tall we can work this out using division: 30 mm 2 = 15 mm
Draw the Mouse Draw the Mouse - - Scaling down Scaling down
