17.直接写得数.
| 1-0.09= | 2÷0.02= | $\frac{2}{3}$+$\frac{1}{5}$= | 0.25×8.5×4= |
| $\frac{5}{6}$+(0.5-$\frac{1}{3}$)= | 0.23= | 5-$\frac{2}{5}$= | $1\frac{3}{5}$:0.875= |
15.脱式计算,能简算的要简算.
| 475+660÷33×25 | 400-14$\frac{13}{27}$-85$\frac{14}{27}$ | $(\frac{5}{9}+\frac{7}{18}-\frac{11}{12})×36$ |
| 5.84×1.36+1.36×3.16+1.36 | [1.9-6÷(2.4×5)]÷(14×0.2) | [($\frac{8}{9}$+$\frac{4}{3}$)×$\frac{3}{4}$-$\frac{1}{4}$]÷$\frac{1}{12}$. |
11.109.995保留两位小数是( )
| A. | 109.99 | B. | 109 | C. | 110.00 |
10.同一个圆中周长与直径的比是( )
| A. | 2л:1 | B. | л:1 | C. | 2:1 |
9.若4:9的前项增加8,要使比值不变,后项应增加( )
| A. | 12 | B. | 18 | C. | 17 |
8.第( )组小棒能组成三角形.
0 137776 137784 137790 137794 137800 137802 137806 137812 137814 137820 137826 137830 137832 137836 137842 137844 137850 137854 137856 137860 137862 137866 137868 137870 137871 137872 137874 137875 137876 137878 137880 137884 137886 137890 137892 137896 137902 137904 137910 137914 137916 137920 137926 137932 137934 137940 137944 137946 137952 137956 137962 137970 199269
| A. | 1,3,5 | B. | 2,4,6 | C. | 2,3,4 |