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Question

Express each of the following rational numbers to the lowest form:
(i) 422
(ii) -36180
(iii) 132-428
(iv) -32-56

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Solution

Lowest form of:
(i) 422 is:4 =2×222 = 2×11HCF of 4 and 22 is 2.Dividing the fraction by 2 , we get 211.(ii) -36180 is:36 = 3×3×2×2180 = 5×3×3×2×2HCF of 36 and 180 is 36.Dividing the fraction by 36 , we get -15
(iii) 132-428 is:132 = 2×3×2×11 428 = 2×2×107HCF of 132 and 428 is 4.Dividing the fraction by 4 , we get 33-107(iv) -32-56 is:32 =2×2×2×2×256 = 2×2×2×7HCF of 32 and 56 is 8. Dividing the fraction by 8, we get47

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