94.38-(13.38-3.42)=94.38-9.96=84.42
94.38-(13.38-3.42)=94.38-13.38+3.42=81+3.42=84.42
从94.38里减去13.38与3.42的差,得多少?94.38-13.38-3.42=77.58
94.38-(13.38-3.42)=94.38-9.96=94.38-10+0.04=84.38+0.04=84.42
(94.38-13.38)-3.42=81-3.42=77.58