757 prompts matching "Subtracting in a base other than ten, with borrowing"
Worked example: Finding the mirror line from an object and its image
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WAEC pitfalls: Reflecting in y equals x by negating instead of swapping
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Quiz me: Rotating a point 90 degrees about the origin
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Spot my mistake: Rotating clockwise when the question says anticlockwise
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Worked example: Finding the angle of rotation from an object and its image
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WAEC pitfalls: Assuming a positive angle of rotation means clockwise
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Quiz me: Finding the image of a point under a given enlargement
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Spot my mistake: Measuring the scale factor from the wrong centre
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Worked example: Finding the centre of enlargement from object and image
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WAEC pitfalls: Assuming a negative scale factor simply shrinks a shape
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Spot my mistake: Multiplying matrices whose orders do not match
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Worked example: Multiplying a 2 by 3 matrix by a 3 by 2 matrix
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WAEC pitfalls: Assuming matrix multiplication is commutative
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Teach me: The determinant of a 2 by 2 matrix
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Quiz me: Calculating a determinant from the four entries
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Spot my mistake: Forgetting to swap the leading diagonal when inverting
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Worked example: Verifying an inverse by multiplying back to the identity
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WAEC pitfalls: Dividing by a determinant of zero
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Teach me: Writing a pair of simultaneous equations in matrix form
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Quiz me: Identifying the coefficient matrix and the constant matrix
Act as my SS3 Mathematics tutor and quiz me on identifying the coefficient matrix and the