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.

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

The value of the ones place in the subtrah

Question

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

anonymous · Answer

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

texaschic101 · Answer

18.9 - 11.4 

18.9 rounds to 19
11.4 rounds to 11 <==== this should have been left alone, NOT rounded up