19.直接写出得数.
0 156167 156175 156181 156185 156191 156193 156197 156203 156205 156211 156217 156221 156223 156227 156233 156235 156241 156245 156247 156251 156253 156257 156259 156261 156262 156263 156265 156266 156267 156269 156271 156275 156277 156281 156283 156287 156293 156295 156301 156305 156307 156311 156317 156323 156325 156331 156335 156337 156343 156347 156353 156361 199269
27+68= | 910-540= | 18×40= | 910÷70= |
78-0.98= | 3÷7= | 10÷0.1= | 22×4-4= |
8.1÷0.03= | 1.5×0.5= | 32×12.5%= | 3×3÷3×3= |