755 prompts matching "IGCSE Additional Maths Y11: Differentiating a sum of terms — Explain It Back"
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Common mistakes with composite and inverse functions
Teach me the most common mistakes SS1 students make with composite and inverse functions,
Learn: Telling a rational number from an irrational one
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Common Mistakes: Why a rational number added to an irrational one stays irrational
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Learn: What makes two surds similar
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Show All Working: Deciding whether two given surds are equal without a calculator
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Learn: Simplifying root 72 into its simplest form
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Show All Working: Simplifying a surd expression that contains brackets
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Learn: Why a surd is never left in the denominator
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Show All Working: Checking a rationalised answer by decimal approximation
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Show All Working: Finding a and b when a plus b root 2 equals a given surd
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Common Mistakes: A surd equation that has no real solution
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Learn: What a binary operation actually is
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Show All Working: Evaluating a repeated operation such as a*(b*c)
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Common Mistakes: A binary operation that is ordinary addition in disguise
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Learn: What closure means for a binary operation
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Show All Working: Showing a set is not closed by a single counter-example
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Learn: What it means for an operation to be commutative
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Show All Working: An operation that is associative but not commutative
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Learn: What it means for one operation to distribute over another
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Show All Working: Using distributivity to simplify an expression
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