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Сложение и вычитание в пределах 30

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Statistics
3.2 secs
Average solve time
93.8%
121/ 129
Success answers / total
0
Training points
Custom
Type task
20 secs
Task time
∞
Count of unique tasks
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Subject:not selected
Teaches: Сложение и вычитание чисел в пределах 100
Required skills:
Сложение и вычитание чисел в пределах 100
Language: ru
Author
Pavel Tyulyandin
Statistics
3.2 secs
Average solve time
93.8%
121/ 129
Success answers / total
0
Training points