Using rearrangement property find the sum of minus 6 by 7 plus minus 5 by 6 plus minus 4 by 9 plus minus 15 by 7
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Using the rearrangement property, Find sum of
(-6/7) + (-5/6) + (-4/9) + (-15/7)
= (-6/7# + (-15/7) +( -5/6) + (-4/9)
=( -21 / 7) - (5 / 6) - (4 / 9)
= - 1 [ (3) + (5 / 6) + (4 / 9 )]
= -1 [(18*3/18)+(5*3/18)+(4*2/18)]
= -1 [ (54 + 15 + 8) /18 ]
= -1 [ 77 / 18 ]
= -77 / 18
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