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Intermediate
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Speed involving constant distance and time
Primary Essential Concepts
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Amber took 1/2 hour to walk from Village A towards Village B at a uniform speed. Yenni took 3/4 hour to walk from Village B towards Village A at a ...
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Intermediate
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New
Quantity and value with comparison model
Primary Essential Concepts
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John has some $1 and 20-cents coins. He has 12 more 20-cent coins than $1 coins. The total value of $1 coins is $12 more than the total value of 20...
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Intermediate
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