进到整十数.
|
(1)29 +( )=30 |
(2)38 +( )=40 |
|
(3)67 +( )=70 |
(4)72 +( )=80 |
|
(5)81 +( )=90 |
(6)52 +( )=60 |
进到整十数.
|
(1)29 +( )=30 |
(2)38 +( )=40 |
|
(3)67 +( )=70 |
(4)72 +( )=80 |
|
(5)81 +( )=90 |
(6)52 +( )=60 |