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Question
Tell which property allows you to compute `1/5 xx [5/6 xx 7/9]` as `[1/5 xx 5/6] xx 7/9`
Solution
`1/5 xx [5/6 xx 7/9]` can be written as `[1/5 xx 5/6] xx 7/9` by the help of associative property for multiplication.
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