Arithmetic Grade Two
Lesson One hundred forty-nine: Missing Numbers
If you recall the multiplication facts from the last lesson, then you should
be able to answer this question.
To answer this question you need to be able to recall that 2 x 5 = 10. Once
you recall this fact, it is easy to realize that the blank in the sample
problem must be filled with a 5.
Here's another problem:
Recall that 2 x 7 = 14. So, the answer to this problem is 7 since 7 fits
into the blank to make the statement true.
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