4.58-(2.58+1.5) 2.3÷0.25÷0.4 5.6÷3.5
2.7×0.99 0.125×3.2×0.25 3.8×1.01
3.72×9.9+3.72×0.1 0.99×0.81+0.99×0.19+0.99
1.39×25-0.039×250 （4.16+4.16+4.16+4.16）×2.5
1（2.5-0.25）×0.4 3.78×99+3.78 65÷（0.65×4）
4.9+0.1-4.9+0.1 5.52-（3.52-0.72）
2.6×0.5+7.4÷2 42.2×103 8.3×99
1.25×2×0.37×4 1.25×8-0.025×80
（2.31+6.69）÷0.03 35.2÷0.25÷0.4 3.6×10.1