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Unformatted text preview: Commutatively: 3+9=9+3 (Pointed out and used)Doubles: 3+3, 4+4 (Learn through practice)Ten combinations: 5+5, 6+4, 7+3 (Learn through practice)Adding ten: 7+10=17 (Pointed out and used)Relating to doubles: 6+7= (6+6)+1=13 (Mental math) Compensation 9+6=10+5 (Mental math) Common student error students over use =....
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 Spring '10
 Kwon
 Math, Addition

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