Question

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

eighteen point nine minus eleven point five
eighteen point nine is approximately equal to nineteen and eleven point five is approximately equal to eleven, so
eighteen point nine minus eleven point five is approximately equal to nineteen minus eleven which is approximately equal to eight

The value of the ones place in the minuend should have been rounded up.

The value of the ones place in the subtrahen