8.下列各组数中,相等的一组是( )
| A. | $\frac{{2}^{3}}{3}$与${(\frac{2}{3})}^{2}$ | B. | -22与(-2)2 | C. | (-3)3与-33 | D. | -|-2|与-(-2) |
4.下列计算正确的是( )
0 294080 294088 294094 294098 294104 294106 294110 294116 294118 294124 294130 294134 294136 294140 294146 294148 294154 294158 294160 294164 294166 294170 294172 294174 294175 294176 294178 294179 294180 294182 294184 294188 294190 294194 294196 294200 294206 294208 294214 294218 294220 294224 294230 294236 294238 294244 294248 294250 294256 294260 294266 294274 366461
| A. | 2a2-6a3=5a5 | B. | (x+y)2=x2+y2 | C. | a6÷a3=a2 | D. | (-a3)2=a6 |