摘要: 5+9= 8+3= 8+4= 6+8= 2+9= 7+9= 5+8= 9+4= 3+9= 9+8=
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2.8×9.05+9.8×1.05
6.7×5.3-4.7+5.3
5.68-4.45+5.32-2.55
57.7÷0.1-477÷(13.26-11.76)
3.24×2.6-3.24+3.24×8.4
[0.15+(4.74-1.8)÷0.4]÷0.1.
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6.7×5.3-4.7+5.3
5.68-4.45+5.32-2.55
57.7÷0.1-477÷(13.26-11.76)
3.24×2.6-3.24+3.24×8.4
[0.15+(4.74-1.8)÷0.4]÷0.1.