优质解答
9.1/10+4/1 93/100-76/100 3/100+5/10 7/10-61/100=0.1+0.4 =0.93-0.76 =0.03+0.5 =0.7-0.61=0.5 =0.17 =0.53 =0.0910.916 841 835.8 690 553.3 420.5 305.2 177.2 45.2本月合计：870.8 45.2思考题4.9+（4.9+9.8）+...
9.1/10+4/1 93/100-76/100 3/100+5/10 7/10-61/100=0.1+0.4 =0.93-0.76 =0.03+0.5 =0.7-0.61=0.5 =0.17 =0.53 =0.0910.916 841 835.8 690 553.3 420.5 305.2 177.2 45.2本月合计：870.8 45.2思考题4.9+（4.9+9.8）+...