1.直接写得数.
25×40= | 5×18= | 41×20= | 420÷7= | 70×20= |
60×20= | 22×40= | 40×25= | 100×25= | 23×30= |
20.下列算式中,( )的积与其他三个算式的积不同.
A. | 48×20 | B. | 24×40 | C. | 12×80 | D. | 48×40 |
19.计算236-36÷4时,先算( )
A. | 236-36 | B. | 36÷4 | C. | 236-4 |
18.下列年份中,( )是闰年.
0 156423 156431 156437 156441 156447 156449 156453 156459 156461 156467 156473 156477 156479 156483 156489 156491 156497 156501 156503 156507 156509 156513 156515 156517 156518 156519 156521 156522 156523 156525 156527 156531 156533 156537 156539 156543 156549 156551 156557 156561 156563 156567 156573 156579 156581 156587 156591 156593 156599 156603 156609 156617 199269
A. | 2012 | B. | 2013 | C. | 2014 |