估算.
|
(1)598 ×5≈ |
(2)189 ×3≈ |
估算.
|
(1)389 ×4≈ |
(2)2600 ×7≈ |
估算.
|
(1)32 ×5≈ |
(2)52 ×6≈ |
估算.
|
(1)18 ×9≈ |
(2)87 ×7≈ |
估算.
|
(1)22 ×4≈ |
(2)69 ×3≈ |
估算下面各题.
|
(1)19 ×7≈ |
(2)39 ×4≈ |
估算下面各题.
|
(1)69 ×8≈ |
(2)84 ×5≈ |
估算下面各题.
|
(1)12 ×3≈ |
(2)92 ×6≈ |