计算.
|
(1)12.5 -2.9= |
(2)20 -1.45= |
计算.
|
(1)3.87 +5.96= |
(2)8.79 +2.43= |
用竖式计算并验算.
|
(1)9.36 -6.39= |
(2)9.6 +2.85= |
|
验算: |
验算: |
用竖式计算并验算.
|
(1)2.8 +6.48= |
(2)20.6 -8.52= |
|
验算: |
验算: |
用竖式计算.
|
(1)9.1 -7.09 |
(2)25.6 +43.7 |