(6.8-6.8×0.55)÷8.5 =

0.12× 4.8÷0.12×4.8=

（3.2×1.5+2.5）÷1.6 =

48.6-1.6÷4=

5.38+7.85-5.37=

7.2÷0.8-1.2×5=

6-1.19×3-0.43=

6.5×（4.8-1.2×4）=

5.8×（3.87-0.13）+4.2×3.74=

32.52-（6+9.728÷3.2）×2.5 =

[（7.1-5.6）×0.9-1.15] ÷2.5=

5.4÷[2.6×（3.7-2.9）+0.62] =

55.12×6÷（12-7.2）-6=

6.12×6÷7.2-6 =

0.68×1.9+0.32×1.9 =

58.58+370）÷（64-45）=

59.420+580-64×21÷28=

60.136+6×（65-345÷23）=

15-10.75×0.4-5.7 =

18.1＋（3－0.299÷0.23）×1=

(6.8-6.8×0.55)÷8.5 =

0.12× 4.8÷0.12×4.8 =

（3.2×1.5+2.5）÷1.6 =