Strategies! Strategies! Strategies!Doubles Clues1+1 (eye) 2+2 (dice) 3+3 (ladybug) 4+4 (spider5+5 (hand) 6+6 (egg) 7+7 (calendar) 8+8 (catepillar)9+9 (truck)Doubles +1 If I know my double facts I just add one more. Ex: 7+6=? Think: If I know 6+6=12, then I know 7+6 is one more at 13.