Math
posted by Hong .
The reason I ask this question "What multiplication fact can be found by using the arrays for 2x9 and 5x9 ?" because I want to understand what exactly it mean, Then I could help my son to do the homework.
This is not my son post it to ask you.
Thanks.

This site should help you.
http://www.haelmedia.com/OnlineActivities_txh/mc_txh3_002.html
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