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Mathematics for IGCSE & O level - Estimation (Section 2 - No. 16)

If a store sells 12 apples at $0.79 each, what is the estimated cost?
$10
$8
$15
$20

解释

Round 0.79 to $0.80 and then multiply by 12; $0.80 * 12 = $9.60 or $10

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