8.一件商品打八折后减少了50元,这件商品现在是( )元.
| A. | 62.5 | B. | 250 | C. | 200 | D. | 240 |
7.小强和小丽同时从学校出发,小强向东走60m,记作+60m,小丽向西走70m,记作-70m,这时两人相距( )
0 137045 137053 137059 137063 137069 137071 137075 137081 137083 137089 137095 137099 137101 137105 137111 137113 137119 137123 137125 137129 137131 137135 137137 137139 137140 137141 137143 137144 137145 137147 137149 137153 137155 137159 137161 137165 137171 137173 137179 137183 137185 137189 137195 137201 137203 137209 137213 137215 137221 137225 137231 137239 199269
| A. | 10m | B. | -10m | C. | 13m | D. | 130m |