The square of a three digit number 5ab starting with 5 is (250 + ab) thousand +(ab)”. Thus, 511²=(250+11) thousand +11°=261121
use this method to write the square of.
(i) 509 (ii) 534(iii) 580
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The square of a three digit number 5ab starting with 5 is (250+ ab) thousand +(ab). Thus, 511? =(250+11) thousand +11° = 261121.
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