To be able to do the problem 5 (10 + 4) mentally, Zack does 50 + 20 instead of 5 (14).
Zack is using which of the following properties?
+5
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Home » Mathematics » To be able to do the problem 5 (10 + 4) mentally, Zack does 50 + 20 instead of 5 (14). Zack is using which of the following properties?