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making ten method
|
CN¥ 3.0 |
the borrowing method ten times
|
CN¥ 3.0 |
addition and subtraction within 10
|
CN¥ 3.0 |
addition and subtraction within 20
|
CN¥ 3.0 |
decomposition and composition within 10
|
CN¥ 3.0 |
decomposition and composition within 20
|
CN¥ 3.0 |





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