SOLUTION: Tom found the sum of 9 and 4 by using ten. 2nd grade math riddle HELP!!!!

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Question 667903: Tom found the sum of 9 and 4 by using ten.
2nd grade math riddle HELP!!!!

Answer by ewatrrr(24785)   (Show Source): You can put this solution on YOUR website!
 
Hi,
If I am understanding correctly
9 + 4 = 9 + 1 + 3 = 10 + 3 = 13
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