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Question

Replace by the correct number:
(i) -58=14
(ii) -15=12
(iii) 12- =16

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Solution


(i) -58=14=14+58=1×24×2+5×18×1 ( Because LCM of 4 & 8 is 8)=28+58=2+58=78=78
(ii) -15=12=12+15=1×52×5+1×25×2=510+210=5+210=710
(iii) 12-=16=12-16=1×32×3-1×16×1 (Because LCM of 2 & 6 is 6)=36-16=2÷26÷2 (HCF of the numerator & denominator is 2)=13

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