估算.
|
(1)250 ÷49≈ |
(2)704 ÷69≈ |
估算.
|
(1)453 ÷45≈ |
(2)904 ÷29≈ |
估算.
|
(1)51 ×620≈ |
(9)208 ×41≈ |
估算.
|
(1)590 ×12≈ |
(2)410 ×98≈ |
估算.
|
475 ÷79≈ |
629 ÷93≈ |
估算.
|
597 ×31≈ |
286 ×49≈ |
估算.
|
(1)704 ×59≈ |
(2)216 ×32≈ |
估算.
|
(1)302 ×37≈ |
(2)69 ×402≈ |