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Sheet # 447 Find the Missing Number


How many stars do you need to make each of the following number sentences true?

1)
+
_______
=


2)
+
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=


3)
+
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=

4)
+
_______
=


5)
+
_______
=


6)
+
_______
=


7)
+
_______
=


8)
+
_______
=


9)
+
_______
=


10)
+
_______
=