Posted by **Takerria** on Thursday, May 10, 2012 at 12:03pm.

Trina rounded to the nearest whole number to solve the expression eighteen point nine minus eleven point four. Her steps are shown below. Which statement correctly describes her error?

eighteen point nine minus eleven point four

eighteen point nine is approximately equal to nineteen and eleven point four is approximately equal to twelve, so

eighteen point nine minus eleven point four is approximately equal to nineteen minus twelve which is approximately equal to seven.

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