1.填表.
半径/cm | 直径/cm | 周长/cm | 面积/cm2 |
2 | |||
9 | |||
28.26 |
20.甲数是乙数的70%,甲数比乙数少( )
A. | 70% | B. | 25% | C. | 30% | D. | 40% |
17.口算下面各题
0 159753 159761 159767 159771 159777 159779 159783 159789 159791 159797 159803 159807 159809 159813 159819 159821 159827 159831 159833 159837 159839 159843 159845 159847 159848 159849 159851 159852 159853 159855 159857 159861 159863 159867 159869 159873 159879 159881 159887 159891 159893 159897 159903 159909 159911 159917 159921 159923 159929 159933 159939 159947 199269
24×5×2= | 330÷30×7= | 25×99= | 300-24-76= |
91-26= | 43×20+40= | 8×19+8= | 150-70+90= |
13×101= | 4×8+6×8= | 4×(25+20)= | 360-9×4= |
682-99= | 9600÷240= | 56×200= | 125×2×8= |
810÷27= | 7×39+7= | 0÷400= | 24×6+24×4= |