口算:
|
(1)45×20= (2)2.6-1.7= |
|
(3)60×80= (4)13×20= |
口算:
|
(1)35×20= (2)600÷3= |
|
(3)27×11= (4)82×10= |
口算:
|
(1)720÷8= (2)30×12= |
|
(3)63-7= (4)21×40= |
估算:
|
58×79 67×38 |
口算:
|
(1)45×20= (2)2.6-1.7= |
|
(3)60×80= (4)13×20= |
口算:
|
(1)35×20= (2)600÷3= |
|
(3)27×11= (4)82×10= |
口算:
|
(1)720÷8= (2)30×12= |
|
(3)63-7= (4)21×40= |
估算:
|
58×79 67×38 |