map102 mathematical problem solving heuristics
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MAP102 Problem Solving Heuristics in Primary Mathematics
www.banhar.blogspot.com
Dr Yeap Ban HarMarshall Cavendish Institute
Venue: Singapore Teachers’ Union
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In today’s class we will use the following heuristics:• Act it out• Draw a diagram• Solve a simpler problem• Solve part of a problem• Draw a table• Look for a pattern• Use algebra
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HeuristicsDraw a Diagram
Jason
Edward
Sam
$837 - $648 = $189
$189 x 3 = $570 - $3 = $567
$837 - $567 = $270
Sam had $270 at first.
Assuming Sam did not spend his money:
Edward had $360 at first.
Jason had $837 - $360 - $270 = $207 at first.
Jason had $207 at first.
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Jason
Edward
Sam
$189 x 3 = $567
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Jason
Edward
Sam
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We found three different ways to make a rectangle using three tangram pieces.
This is the act it out heuristics.
HeuristicsAct It Out
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2 442, 24
The difference between 42 and 24 is
18.
HeuristicsLook for a Pattern
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HeuristicsAct It Out
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We used 9 sticks to make three different arrangements with four such triangles.
The least number of sticks used is 6!
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We also solved these which were raised by participants
Each symbol stands for a number.
+ + + + + = 40 x = 40
What number does stand for?
11 trees are in a road. The distance between each tree is equal.The distance between the 1st tree and 4th tree is 18m.Find the distance between the 1st tree and last tree.
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Try these with your kids!
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