17.下列计算正确的是( )
| A. | 4a-3a=1 | B. | a6÷a3=a2 | C. | 2a2•a=2a3 | D. | 3a+2b=5ab |
16.-5的倒数的相反数是( )
0 296802 296810 296816 296820 296826 296828 296832 296838 296840 296846 296852 296856 296858 296862 296868 296870 296876 296880 296882 296886 296888 296892 296894 296896 296897 296898 296900 296901 296902 296904 296906 296910 296912 296916 296918 296922 296928 296930 296936 296940 296942 296946 296952 296958 296960 296966 296970 296972 296978 296982 296988 296996 366461
| A. | 5 | B. | $\frac{1}{5}$ | C. | -5 | D. | $-\frac{1}{5}$ |