The reciprocal ratio of 217:218 is ____
Evaluate: (i) (38)2−(37)2 (ii) (75)2−(74)2 (iii) (92)2−(91)2 (iv) (105)2−(104)2 (v) (141)2−(140)2 (vi) (218)2−(217)2
Name the property used to write 218 x 102 = 218 x 100 + 218 x 2