期末检测一、1.24;2;12.5% 2.24;800 3.18;60% 4.6;480 5.22;26 6.2 7.2 8.41 9.3/4;19/12 10. 7:5 5/12 11.6;8 12.360 13.17 14.1/10;9/10 15.40 二、 1.√ 2.╳ 3.╳ 4.╳三、1. C 2. C 3. A 4. B四、1. 3/2 1/7 16/25 9 16 1/20 0 24/49 36 1/4 2.=5/8÷1/4 =7/9×45+1/3×45-4/5×45 =7/9×(17+1) =5/2 =35+15-36 =7/9×18 =14 =14 =19/16×5/7-3/16×5/7 =8/13×1/7+1/7×6/13 =2-6/13×26/9-2/3 =(19/16-3/16)×5/7 =1/7×(8/13+6/13) =2-4/3-2/3 =5/7 =1/7×14/13 =0 =2/13五、略六、1. (1)2/3×4/5 (2)4/5×(1-1/8) (3)6×12×÷(5+3)×32. 120×2/3×1/4=20(人) 答:获一等奖的有20人3.2800-700=2100(元),2100÷2800=75%; 答:现价是2100元,现价是原价的75%。4. (1)50×30+50×3×2+30×3×2=1980(平方米) (2)50×30×2=3000(立方米)5. 设四年级的人数为x,则五年级的人数为 |