Question

вычислите а)6 1/3 - 9 ; б) 3/8:( -6/32); в) 9/14 •( -4, (2)); г) - 0,9• ( - 0,1) ;. д) -12 5/7 + 5 3/5 е) 7/12 • ( -36);. ж) -64 : {- 16/9); з) 38: ( - 0, 019). ​

Answer 1

а) 6 1/3 - 9 = -(8 3/3 - 6 1/3) = -2 2/3

б) 3/8 : (-6/32) = 3/8 · (-32/6) = -(1·4)/(1·2) = -4/2 = -2

в) 9/14 · (-4,(2)) = 9/14 · (-4 2/9) = 9/14 · (-38/9) = -38/14 = -19/7 = -2 5/7

г) -0,9 · (-0,1) = 0,09

д) -12 5/7 + 5 3/5 = -(12 25/35 - 5 21/35) = -7 4/35

е) 7/12 · (-36/1) = -(7·3)/(1·1) = -21

ж) -64 : (-16/9) = 64/1 · 9/16 = (4·9)/(1·1) = 36

з) 38 : (-0,019) = 38000 : (-19) = -2000