3.直接写出得数.
127+38= | 0.25×40= | 4.5÷9= | 1.02-0.43= |
$\frac{1}{2}$-$\frac{1}{5}$= | $\frac{2}{3}$+$\frac{3}{8}$= | $\frac{7}{15}$×$\frac{5}{12}$= | 0÷$\frac{9}{23}$= |
2.用2,3,7,8,四个数字可以组( )个两位数乘两位数的式子.
0 158714 158722 158728 158732 158738 158740 158744 158750 158752 158758 158764 158768 158770 158774 158780 158782 158788 158792 158794 158798 158800 158804 158806 158808 158809 158810 158812 158813 158814 158816 158818 158822 158824 158828 158830 158834 158840 158842 158848 158852 158854 158858 158864 158870 158872 158878 158882 158884 158890 158894 158900 158908 199269
A. | 8 | B. | 12 | C. | 16 | D. | 24 |