简便运算 5.6+2.7+4.5 9.14-1.43-4.57 77+2. 50
简便运算5.6+2.7+4.59.14-1.43-4.5777+2.7+2.8+250.38+0.36+2.649.5+4.85-6.13...
简便运算 5.6+2.7+4.5 9.14-1.43-4.57 77+2.7+2.8+25 0.38+0.36+2.64 9.5+4.85-6.13
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