а) - 5/16-( 1/16-7/8) = ( дробью )
б) (-2/15-4/5)+3/10 = ( дробью )
г) (- 2/15-4/5)+3/10 = ( дробью )
е)- 2/15+4/5)-3/10 = ( дробью )

а) 3/25*(- 5/49)+22/25*(- 5/49) = ( дробью )

а) - 10/11*(- 11/12)*(- 12/13)*(- 13/14)*(- 14/15) = ( дробью )
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