THINKINGMATH@onSponge's Conquer Problem Sums series focus on getting a pupil to grasp a conceptual understanding of the problem type, before guiding him or her to use a suitable method or strategy to solve the problem, as indicated in the Introduction to ThinkingMath.
THE More Than/Less Than key construct applied in ThinkingMath@onSponge has a number of variations for specific situations. These include solving problem sum groupings involving comparisons and multiple individuals. In this article, we present four more variations.
As mentioned previously, the phrase ‘whole number more than or less than' in a problem statement indicates it is best to use model drawing.
For problem sums grouped under this External Unchanged variation, when drawing the model diagram remember that an amount is removed from only one individual or item; the other individual's (or item) amount will remain the same before and after.
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Type 2 involves a more complex model where each individual/item is represented by more than one bar.
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Type 3 involves cutting the model representing the individual/item (remains the same size) into appropriate number of smaller units.
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In the Internal Transfer key construct variation, the total number of items remains the same as any movement is confined within the items identified in the question.
More samples from Conquer Problem Sums series
Click below for other articles in our series on key constructs:
Introduction to ThinkingMath / Key constructs in Conquer Problem Sums
More Than/Less Than (Comparison, Division)
Equal Stage
Repeated Identity
Part-Whole Relationship
Equal Fractions, Internal Transfer, Guess & Check
Number x Value, External Change, Gaps & Differences
Which particular questions are you referring to as all of the questions in the +hinkingMath books have full solutions provided.
