What is the unknown number? 8 + ___ = 8
Facts with unknowns
Flashcard
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Mathematics
•
1st Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
Back
0
2.
FLASHCARD QUESTION
Front
What is the unknown number? 2 + ___ = 4
Back
2
3.
FLASHCARD QUESTION
Front
What is the unknown number? 10 + ___ = 10
Back
0
4.
FLASHCARD QUESTION
Front
What is the unknown number? 6 + ___ = 8
Back
2
5.
FLASHCARD QUESTION
Front
What is the unknown number? 3 + ___ = 7
Back
4
6.
FLASHCARD QUESTION
Front
What do we call a number that we don't know?
Back
Unknown number
7.
FLASHCARD QUESTION
Front
What is the result of adding 0 to any number?
Back
The same number.
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