without actually finding the squares fill in the blanks
36²-35²
28²-27²
51²-50²
31²-30²
17²-16²
18²-17²
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(36+ 35 )(36- 35) = 71× 1 = 71
(28+27 )( 28- 27 )= 55 ×1 = 55
(51 +50)(51-50)= 101×1 = 101
(31+30)(31-30)= 61×1= 61
(17+16)(17-16)= 33×1= 33
(18+17)(18-17)= 35×1=35
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