( 6 1/2 - 8 3/4 ) : 1/8 + 11 3/7 * 49/60 =
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1) 6 1/2 - 8 3/4 = 6.5 - 8.75 = ( - 2.25)
2) - 2.25 : 1/8 = - 2 1/4 : 1/8 = - 9/4 : 1/8 = - 18
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3) 11 3/7 * 49/60 = 80/7 * 49/60 = 28/3 = 9 1/3
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4) - 18 + 9 1/3 = - 17 3/3 + 9 1/3 = - 8 2/3
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Ответ минус восемь целых две третьих