16.王阿姨买了14个苹果共重2.1千克,如果买这样的苹果13千克,大约有( )个苹果.
A. | 40 | B. | 60 | C. | 80 | D. | 140 |
15.估一估,下列四个算式中得数最大的是( )
A. | 5.04÷6 | B. | 76.5÷45 | C. | 0.84÷2.8 | D. | 7.65÷8.4 |
14.下面各式中,( )是方程.
0 164243 164251 164257 164261 164267 164269 164273 164279 164281 164287 164293 164297 164299 164303 164309 164311 164317 164321 164323 164327 164329 164333 164335 164337 164338 164339 164341 164342 164343 164345 164347 164351 164353 164357 164359 164363 164369 164371 164377 164381 164383 164387 164393 164399 164401 164407 164411 164413 164419 164423 164429 164437 199269
A. | y-10 | B. | 5a=1.5 | C. | b+1.7>4.3 | D. | 1.8+2.3=4.1 |