34-20-2=X - 34-22=X, 52 - 46 =X - 52-40-6=X, 63-31 =X - 63-30-1=X, 71- 51 =X - 71-50-1=X, 56 - 50-1=X - 56-51=X, 43 -10-4 =X - 43-14, 46 - 25 = X - 46-20-5=X, 66 - 20-2 =X - 66-22=X,

L 7 Ready Math 2 Digit Addition without regrouping

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