Fred's basement is flooded. The basement floor is 3.43.43, point, 4 meters below the ground floor. The water is 1.21.21, point, 2 meters high.
The following equation describes this situation.
\quad -3.4+1.2 = -2.2−3.4+1.2=−2.2minus, 3, point, 4, plus, 1, point, 2, equals, minus, 2, point, 2
What does -2.2−2.2minus, 2, point, 2 tell us?