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b)1 1/8-2 3/4=9/8-22/8= -1 5/8
c)3 2/9-1 5/6=58/18-33/18=1 7/18
d) -1 1/2- 3 5/7= - 1 7/14 - 3 10/14= - 5 3/14
e)6/7x 7/4 = 42/28=1 14/28= 1 1/2
f)2 2/5 x (-1 2/3)=12/5x (-5/3)= - 60/15 = 4
g) - 3 1/5: 4/9 = -16/5 x 9/4 = -144/20 = - 7 4/20 = -7 1/5
h) -2/3 : ( -1 1/9)= - 2/3 : (-10/9)= - 2/3 x(- 9/10)= 18/30= 9/15
a) 13,7+2,84=16,54
b)7,2-5,61=7 20/100 - 5 61/100= 6 120/100- 5 61/100 = 1 59/100 = 1,59
c) - 2,333 - 6,78 = - 2 333/1000 - 6 780/1000= - 9 113/100= 9,113
d) - 2,7 +8,002= 8 2/1000- 2 700/1000= 7 1002/1000-2 700/1000=
5 302/1000=5,302
e)