755 prompts matching "The angle between two lines found from their gradients"
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Cross-multiplying to solve an equation with fractions
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Quiz me rapid-fire on expanding and factorising
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Common sign errors in algebraic manipulation
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Quiz: Writing a recurring decimal as a fraction to show it is rational
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Show All Working: Classifying a mixed list of numbers as rational or irrational
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Practice: Collecting similar surds in an expression
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Spot My Mistake: Why root 8 and root 2 turn out to be similar
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Learn: Simplifying root 72 into its simplest form
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Practice: Multiplying a whole number by a surd
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Show All Working: Simplifying a surd expression that contains brackets
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Worked Example: Rationalising a denominator that is a single surd
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Show All Working: Checking a rationalised answer by decimal approximation
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Learn: Solving an equation with a single square root term
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Worked Example: Squaring both sides safely when solving a surd equation
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Quiz: Checking a surd equation for extraneous roots
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Practice: Solving an equation with a surd on each side
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Spot My Mistake: Solving a surd equation that leads to a quadratic
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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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Learn: What a binary operation actually is
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Practice: A binary operation set out as a table
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