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July 2014
Singapore Math Strategies National Conference
Staff Development for Educators | Las Vegas
 yeapbanhar@gmail.com |  www.banhar.blogspot.com |
Course SD09 | Visualization – Getting Students to See the Math
Visualization is an important human ability.
Task 1 |
Use a geoboard to make a polygon with exactly 4 dots on its sides.
Find its area. What do you notice?

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Task 2 |
Mel took a 150-inch wire and used some of it to make this figure.
The figure comprises six equilateral triangles. The length of AB is 19 inches.
Find the length of wire left over.
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Task 3 |
51 ÷ 3 4012 ÷ 4 558 ÷ 6
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Task 4 |
Nancy had 30 more coins than Peter at first. Peter gave 12 of his coins to Nancy.
Nancy now has 3 times as many coins as Peter. How many coins did Peter have
at first?