19.李奶奶家养鸡6只,鸭的只数是鸡的5倍,李奶奶家鸡和鸭一共有( )只.
| A. | 30 | B. | 36 | C. | 24 |
18.一袋水泥重50( )
| A. | 克 | B. | 千克 | C. | 吨 |
17.8的4倍是多少?算式是( )
0 137247 137255 137261 137265 137271 137273 137277 137283 137285 137291 137297 137301 137303 137307 137313 137315 137321 137325 137327 137331 137333 137337 137339 137341 137342 137343 137345 137346 137347 137349 137351 137355 137357 137361 137363 137367 137373 137375 137381 137385 137387 137391 137397 137403 137405 137411 137415 137417 137423 137427 137433 137441 199269
| A. | 8÷4 | B. | 8×4 | C. | 4+4+4+4+4+4+4+4 |