17.直接写出得数.
6.4÷0.8=8; | 8×2.5=20; |
0.2×0.78=0.156; | 6.6÷0.6=11; |
1.8×0.3=0.54; | 0.1×0.02=0.002; |
3.8×8.2+3.8×1.8=38; | 0.99×1.25×8=9.9. |
14.
0 159799 159807 159813 159817 159823 159825 159829 159835 159837 159843 159849 159853 159855 159859 159865 159867 159873 159877 159879 159883 159885 159889 159891 159893 159894 159895 159897 159898 159899 159901 159903 159907 159909 159913 159915 159919 159925 159927 159933 159937 159939 159943 159949 159955 159957 159963 159967 159969 159975 159979 159985 159993 199269
看算式直接写得数 $\frac{1}{3}$+$\frac{1}{4}$= | 2-$\frac{4}{5}$= | $\frac{2}{3}$×$\frac{3}{4}$= | $\frac{2}{3}$÷$\frac{3}{2}$= |
6÷$\frac{6}{7}$= | 0÷$\frac{4}{9}$= | 1÷$\frac{4}{5}$= | $\frac{4}{5}$÷5= |
$\frac{1}{2}$÷2= | $\frac{1}{2}$÷$\frac{1}{3}$= |