Arithmetic Grade Three
Lesson Fifty-five: 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 10 x 2 = 20. Once
you recall this fact, it is easy to realize that the blank in the sample
problem must be filled with a 2.
Here's another problem:
Recall that 10 x 7 = 70. So, the answer to this problem is 7 since 7 fits
into the blank to make the statement true.
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