9.用竖式计算(带“★”的要验算)
697+389= | 705+365= | ★327+425= |
1000-389= | 508-229= | ★602-375= |
8.口算:
63-19= | 770+360= | 45÷9= | 472+528= |
54+28= | 820-570= | 607-400= | 7×6+9= |
56÷8= | 43×2= | 323+439≈ | 452-248≈ |
7.下列算式中,得数大于300的算式是( )
0 164237 164245 164251 164255 164261 164263 164267 164273 164275 164281 164287 164291 164293 164297 164303 164305 164311 164315 164317 164321 164323 164327 164329 164331 164332 164333 164335 164336 164337 164339 164341 164345 164347 164351 164353 164357 164363 164365 164371 164375 164377 164381 164387 164393 164395 164401 164405 164407 164413 164417 164423 164431 199269
A. | 582-426 | B. | 39+248 | C. | 400-109 | D. | 800-483 |