1、 .
(5.5+6.8×0.65)÷2.5 8.12× 6.8÷0.12×12.8
(3.2×1.5+2.5)÷1.6 5.38+7.85-5.37
17.2÷0.8-1.2 0.68×1.9+0.32×1.9
10.15-10.75×0.4-5.7 12.8×(3.27-0.53)+4.2×13.7
6.1+9.728÷3.2×2.5 (7.1-5.
2、6)×0.9+1.15
5.6×(3.7-2.9)+0.83 5.5+(12.8-6.8×0.55)÷8.5
0.12× 4.8÷0.12 (3.2×1.5+2.5)÷1.6
5.38+7.85-5.37 7.2÷0.8-1.2×5.2
6.5×(14.8-1.2×4.3) 5.8×(3.87-0.13)+4.2×3.74
32.52-(6.6+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] (6.8-6.8×0.55)÷8.5
0.12× 4.8-5.26×3.2 (3.2×1.5+2.5)÷1.6
0.68×1.9+0.32×1.9
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