题目内容
用凑整的方法算.
|
例:38 +29= |
(1)57 +23= |
|
|
38 +2=40 |
__________ |
|
|
40 +27=67 |
__________ |
|
|
(2)75 +17= |
(3)24 +39= |
(4)49 +32= |
|
__________ |
__________ |
__________ |
|
__________ |
__________ |
__________ |
答案:80;92;63;81
解析:
解析:
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相关题目
用凑整的方法算.
|
例:38 +29= |
(1)68 +17= |
(2)29 +35= |
|
38 +2=40 |
__________ |
__________ |
|
40 +27=67 |
__________ |
__________ |
|
(3)36 +19= |
(4)46 +38= |
|
|
__________ |
__________ |
|
|
__________ |
__________ |
用凑整的方法算.
|
例:38 +29= |
(1)68 +17= |
(2)29 +35= |
|
38 +2=40 |
__________ |
__________ |
|
40 +27=67 |
__________ |
__________ |
|
(3)36 +19= |
(4)46 +38= |
|
|
__________ |
__________ |
|
|
__________ |
__________ |
用凑整的方法算.
|
例:38 +29= |
(1)57 +23= |
|
|
38 +2=40 |
__________ |
|
|
40 +27=67 |
__________ |
|
|
(2)75 +17= |
(3)24 +39= |
(4)49 +32= |
|
__________ |
__________ |
__________ |
|
__________ |
__________ |
__________ |