竖式计算．
|
(1)62 ×70= |
(2)750 ÷5= |
竖式计算．
|
(1)34 ×28= |
(2)408 ÷2= |
竖式计算．
|
(1)18 ×15= |
(2)786 ÷6= |
估算．
|
(1)239 ÷8≈ |
(2)1198 ÷6≈ |
估算．
|
(1)405 ×4≈ |
(2)89 ×2≈ |
估算．
|
(1)71 6÷8≈ |
(2)638 ÷8≈ |
估算．
|
(1)495 ×3≈ |
(2)2703 ÷9≈ |
估算．
|
(1)985 ÷2≈ |
(2)1218 ÷3≈ |
估算．
|
(1)57 ×6≈ |
(2)492 ÷5≈ |