1,447 prompts matching "Estimating an answer by rounding each quantity first"
Worked example: Bringing a negative number into the right residue class
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Worked example: The number of elements in a set
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WAEC pitfalls: Writing a set with its elements repeated
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Worked example: The formula for the number in a union
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WAEC pitfalls: Counting the overlap twice in a union
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WAEC pitfalls: Negating a statement containing all or some
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WAEC pitfalls: Filling a truth table column out of order
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WAEC pitfalls: Treating a partial variation as a direct one
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Worked example: Substituting into the quadratic formula carefully
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WAEC pitfalls: Dropping the plus-or-minus from the formula
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WAEC pitfalls: Joining the points of a parabola with straight lines
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Worked example: The perimeter of a segment
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WAEC pitfalls: Leaving out the two radii when finding a sector's perimeter
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Worked example: Rolling a sector into a cone
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WAEC pitfalls: Using the sector radius as the cone's base radius
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Worked example: The frustum of a pyramid
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WAEC pitfalls: Leaving out one of the two circular faces
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Worked example: Finding a missing dimension from a given compound volume
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WAEC pitfalls: Counting a hidden joining face in the surface area
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WAEC pitfalls: Choosing class intervals that overlap
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