757 prompts matching "IGCSE Maths Y10: The triangular numbers — Explain It Back"
WAEC pitfalls: Reflecting in y equals x by negating instead of swapping
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WAEC pitfalls: Assuming a positive angle of rotation means clockwise
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Explain back: What a fractional scale factor does to a shape
I have just studied what a fractional scale factor does to a shape in my SS3 Mathematics c
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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Explain back: When two matrices can be multiplied at all
I have just studied when two matrices can be multiplied at all in my SS3 Mathematics class
WAEC pitfalls: Assuming matrix multiplication is commutative
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WAEC pitfalls: Dividing by a determinant of zero
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Worked example: Solving a 2 by 2 system by the matrix method
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Worked example: Sketching a quadratic from its factorised form
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Worked example: Testing the vertices of the feasible region
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Worked example: Estimating the median from a cumulative frequency curve
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Worked example: The mean deviation of an ungrouped data set
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WAEC pitfalls: Comparing two pie charts of different totals directly
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Quiz me: Rounding a number to a stated number of significant figures
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Explain back: Decimal places and significant figures distinguished
I have just studied decimal places and significant figures distinguished in my SS3 Mathema
WAEC pitfalls: Dropping trailing zeros that are in fact significant
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Explain back: Why percentage error is more useful than absolute error
I have just studied why percentage error is more useful than absolute error in my SS3 Math
Worked example: The percentage error left by a rounded calculation
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WAEC pitfalls: Giving a percentage error as a negative quantity
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