Question
What approximate value
will replace the question mark (?) in the following? 19.99 × 20.01 – 15.01 × 14.99 = ?Solution
19.99 × 20.01 – 15.01 × 14.99 = ? 20 × 20 – 15 × 15 ~ ? ? ~ 400 – 225 ? ~ 175
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