Multiplication is commutative for rational
numbers
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Multiplication of rational numbers is commutative. If a/b and c/d are any two rational numbers, then (a/b)x (c/d) = (c/d)x(a/b). Therefore, Commutative property is true for multiplication.
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(i) In hilly and mountainous regions, people build diversion channels like 'gul' or 'kul' in Western Himalaya for agriculture. (ii) Roof-top rainwater harvesting was commonly practised to store drinking water, particularly in Rajasthan. (iii) In West Bengal, people develop inundation channels to irrigate their fields.
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