ADDITION (INTRO)

Just before you start

1 + 1 = 2.  When you add 1 to a number, the number increases by one e.g. 4 + 1 = 5 When you add 2 to a number, it increases by 2 steps e.g. 7 + 2 = 9   

YOU HAVE 2 MINUTES FOR EACH OF THE MENTAL DRILLS BELOW

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