19.
| 直接写出得数. 93÷3= | 1000×0.027= | 9.34-4.56= | 55×20= |
| 0.9÷100= | 6-2.3= | 0÷78= | 6.4+0.7= |
| 8×9+8= | 125×7×8= | 25+75-25+75= | 10-2.3-2.7= |
15.把一个小数的小数点先向右移动一位,再向左移动三位,原数( )
0 134257 134265 134271 134275 134281 134283 134287 134293 134295 134301 134307 134311 134313 134317 134323 134325 134331 134335 134337 134341 134343 134347 134349 134351 134352 134353 134355 134356 134357 134359 134361 134365 134367 134371 134373 134377 134383 134385 134391 134395 134397 134401 134407 134413 134415 134421 134425 134427 134433 134437 134443 134451 199269
| A. | 扩大到原来的10倍 | B. | 缩小到原来的$\frac{1}{10}$ | ||
| C. | 缩小到原来的$\frac{1}{100}$ |