TO ADD 2-DIGIT NUMBERS-2a Example; 25 FIRST: Simplify the problem into two parts: + 34 2 5 (5 pennies) 1 1 1 1 1 ---- 3 4 (4 pennies) 1 1 1 1 ---- --- --------- 5 9 1 1 1 1 1 + 1 1 1 1 so 25 + 34 ------ 59 tens ones Another example: 25 Simplify 2 5 (5 pennies)1 1 1 1 1 +89 8 9 (9 pennies)1 1 1 1 1 1 1 1 1 ---- --- 14 (one 10s + 4) = 14 ---- 10 (ten 10s + 0) = 100 -------------- --- eleven 10s +4 or 114 END