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Sheet # 451 Find the Missing Number


What number goes in the blank to make the sentence true?

1) 4 + 5 + ____ = 12


2) 9 + 1 + _____ = 10


3) 6+ 6 + _____ = 15


4)12 + 0 + _____ = 14


5) 10 + 4 + _____ = 20


6) _____ + 2 + 11 = 16


7) _____ + 2 + 10 = 17


8) 17 - _____ = 10


9) 20 -____ = 12


10) 2 + 5 + _____ = 10