简便运算:20.7-6.32-0.68 9.25*0.8+9.25*0.2 0.89*100.1 24*(3/8+5/6) 24/13-(1/5+11/13)-4/51.7*3.5-3.5*1.5 6*1/4+14/4 23.19+2.4+2.91+14.6 7.32*4.8+0.52*73.2 7/9/11/5+5/11*2/9 25/17-1/3*9/8-5/8 3/4*3/8+(1-5/8)*1/4 16

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