估一估,比一比.
|
(1)270 ÷4○122÷2 |
(2)28 ×2○240÷6 |
|
(3)11 ×9○24×5 |
估一估,比一比.
|
(1)451 ÷9○6×8 |
(2)45 ×2○403÷5 |
|
(3)48 ÷2○24×2 |
估一估,算一算,比一比.
|
(1)62 ÷2○84÷4 |
(2)25 +58○62×2 |
|
(3)20 ×3○30×2 |
估一估,算一算,比一比.
|
(1)5 ×8○120÷4 |
(2)23 ×4○246÷3 |
|
(3)22 ×4○88÷2 |