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

eighteen point five minus eleven point nine
eighteen point five is approximately equal to eighteen and eleven point nine is approximately equal to twelve, so
eighteen point five minus eleven point nine is approximately equal to eighteen minus eleven which is approximately equal to seven The value of the ones place in the minuend should have been rounded up. The value of the ones place in the subtrahend

Question

Trina rounded to the nearest whole number to solve the expression eighteen point five minus eleven point nine. Her steps are shown below. Which statement correctly describes her error? 

eighteen point five minus eleven point nine 
eighteen point five is approximately equal to eighteen and eleven point nine is approximately equal to twelve, so 
eighteen point five minus eleven point nine is approximately equal to eighteen minus eleven which is approximately equal to seven  The value of the ones place in the minuend should have been rounded up. The value of the ones place in the subtrahend

anonymous · Answer

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