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b) 3 1/4 - 8 5/6 = 3 3\12 - 8 10\12 = 12 1\12
c) -2 3/5 + 7 1/3 = -2 9\15 + 7 5\15 = 4 11\15
d) -3,12- 6,1 = -9,22
e) -7,2 + 12,36 = 5,16
f) 6,4 - 10,25 = -3,85
g) -3 1/7 - 1,2 = -3 1\7 - 1 1\5 = -3 5\35 - 1 7\35 = 4 12\35
h) 4 5/6 - 8,2 = 4 25\30 - 8 6\30 = 3 11\35
b)3 1/4 - 8 5/6 = 13/4 - 53/6 = 39/12 - 106/12 = -67/12 = - 5 7/12
c)-2 3/5 + 7 1/3 = -13/5 + 22/3 = - 39/15 + 110/15 = 71/15 = 4 11/15
d)- 3,12- 6,1 = - 9,22
e)-7,2+12,36 = 5,16
f)6,4-10,25 = - 3,85
g)-3 1/7- 1,2 = - 22/7 - 6/5 = -110/35 - 42/35 = 152/35 = 4 12,35
h)4 5/6 - 8,2 = 29/6 - 41/5 = 145/30 - 246/30 = -101/30 = -3 11/30