@ @pbjïØ Üa@ @T 11 2000 1 () 3 3 11 . 33 11 . 2000 = 181 11 11 33 . 2000 = 60 33 .181 − 60 = 121 626 15 () . 252 = 625 42 = 16 . 4 ≤ x ≤ 25 x .(25 − 4) + 1 = 22 [Addition Principle] 25 29 32